diff --git a/arduino/cores/packagemanager/download.go b/arduino/cores/packagemanager/download.go
index a3305fa3d4c..45da56ecb39 100644
--- a/arduino/cores/packagemanager/download.go
+++ b/arduino/cores/packagemanager/download.go
@@ -17,7 +17,6 @@ package packagemanager
 
 import (
 	"fmt"
-	"net/http"
 
 	"github.com/arduino/arduino-cli/arduino/cores"
 	"go.bug.st/downloader"
@@ -101,16 +100,16 @@ func (pm *PackageManager) FindPlatformReleaseDependencies(item *PlatformReferenc
 
 // DownloadToolRelease downloads a ToolRelease. If the tool is already downloaded a nil Downloader
 // is returned.
-func (pm *PackageManager) DownloadToolRelease(tool *cores.ToolRelease, downloaderHeaders http.Header) (*downloader.Downloader, error) {
+func (pm *PackageManager) DownloadToolRelease(tool *cores.ToolRelease, config *downloader.Config) (*downloader.Downloader, error) {
 	resource := tool.GetCompatibleFlavour()
 	if resource == nil {
 		return nil, fmt.Errorf("tool not available for your OS")
 	}
-	return resource.Download(pm.DownloadDir, downloaderHeaders)
+	return resource.Download(pm.DownloadDir, config)
 }
 
 // DownloadPlatformRelease downloads a PlatformRelease. If the platform is already downloaded a
 // nil Downloader is returned.
-func (pm *PackageManager) DownloadPlatformRelease(platform *cores.PlatformRelease, downloaderHeaders http.Header) (*downloader.Downloader, error) {
-	return platform.Resource.Download(pm.DownloadDir, downloaderHeaders)
+func (pm *PackageManager) DownloadPlatformRelease(platform *cores.PlatformRelease, config *downloader.Config) (*downloader.Downloader, error) {
+	return platform.Resource.Download(pm.DownloadDir, config)
 }
diff --git a/arduino/libraries/librariesmanager/download.go b/arduino/libraries/librariesmanager/download.go
index 8b4c07feb31..e64a5891991 100644
--- a/arduino/libraries/librariesmanager/download.go
+++ b/arduino/libraries/librariesmanager/download.go
@@ -25,8 +25,8 @@ import (
 var LibraryIndexURL, _ = url.Parse("https://downloads.arduino.cc/libraries/library_index.json")
 
 // UpdateIndex downloads the libraries index file from Arduino repository.
-func (lm *LibrariesManager) UpdateIndex() (*downloader.Downloader, error) {
+func (lm *LibrariesManager) UpdateIndex(config *downloader.Config) (*downloader.Downloader, error) {
 	lm.IndexFile.Parent().MkdirAll()
 	// TODO: Download from gzipped URL index
-	return downloader.Download(lm.IndexFile.String(), LibraryIndexURL.String(), downloader.NoResume)
+	return downloader.DownloadWithConfig(lm.IndexFile.String(), LibraryIndexURL.String(), *config, downloader.NoResume)
 }
diff --git a/arduino/resources/helpers.go b/arduino/resources/helpers.go
index c4728465397..485f9410d97 100644
--- a/arduino/resources/helpers.go
+++ b/arduino/resources/helpers.go
@@ -17,7 +17,6 @@ package resources
 
 import (
 	"fmt"
-	"net/http"
 	"os"
 
 	"github.com/arduino/go-paths-helper"
@@ -44,7 +43,7 @@ func (r *DownloadResource) IsCached(downloadDir *paths.Path) (bool, error) {
 }
 
 // Download a DownloadResource.
-func (r *DownloadResource) Download(downloadDir *paths.Path, downloaderHeaders http.Header) (*downloader.Downloader, error) {
+func (r *DownloadResource) Download(downloadDir *paths.Path, config *downloader.Config) (*downloader.Downloader, error) {
 	cached, err := r.TestLocalArchiveIntegrity(downloadDir)
 	if err != nil {
 		return nil, fmt.Errorf("testing local archive integrity: %s", err)
@@ -72,7 +71,5 @@ func (r *DownloadResource) Download(downloadDir *paths.Path, downloaderHeaders h
 		return nil, fmt.Errorf("getting archive file info: %s", err)
 	}
 
-	downloadConfig := downloader.Config{
-		RequestHeaders: downloaderHeaders}
-	return downloader.DownloadWithConfig(path.String(), r.URL, downloadConfig)
+	return downloader.DownloadWithConfig(path.String(), r.URL, *config)
 }
diff --git a/arduino/resources/helpers_test.go b/arduino/resources/helpers_test.go
index 1e9e872099d..20733cdb0e0 100644
--- a/arduino/resources/helpers_test.go
+++ b/arduino/resources/helpers_test.go
@@ -25,6 +25,7 @@ import (
 
 	"github.com/arduino/go-paths-helper"
 	"github.com/stretchr/testify/require"
+	"go.bug.st/downloader"
 )
 
 type EchoHandler struct{}
@@ -52,7 +53,7 @@ func TestDownloadApplyUserAgentHeaderUsingConfig(t *testing.T) {
 		URL:             srv.URL,
 	}
 
-	d, err := r.Download(tmp, http.Header{"User-Agent": []string{goldUserAgentValue}})
+	d, err := r.Download(tmp, &downloader.Config{RequestHeaders: http.Header{"User-Agent": []string{goldUserAgentValue}}})
 	require.NoError(t, err)
 	err = d.Run()
 	require.NoError(t, err)
diff --git a/arduino/resources/resources_test.go b/arduino/resources/resources_test.go
index d6f59f75227..5fcdfd43570 100644
--- a/arduino/resources/resources_test.go
+++ b/arduino/resources/resources_test.go
@@ -18,11 +18,11 @@ package resources
 import (
 	"crypto"
 	"encoding/hex"
-	"net/http"
 	"testing"
 
 	"github.com/arduino/go-paths-helper"
 	"github.com/stretchr/testify/require"
+	"go.bug.st/downloader"
 )
 
 func TestDownloadAndChecksums(t *testing.T) {
@@ -42,7 +42,7 @@ func TestDownloadAndChecksums(t *testing.T) {
 	require.NoError(t, err)
 
 	downloadAndTestChecksum := func() {
-		d, err := r.Download(tmp, http.Header{})
+		d, err := r.Download(tmp, &downloader.Config{})
 		require.NoError(t, err)
 		err = d.Run()
 		require.NoError(t, err)
@@ -58,7 +58,7 @@ func TestDownloadAndChecksums(t *testing.T) {
 	downloadAndTestChecksum()
 
 	// Download with cached file
-	d, err := r.Download(tmp, http.Header{})
+	d, err := r.Download(tmp, &downloader.Config{})
 	require.NoError(t, err)
 	require.Nil(t, d)
 
diff --git a/cli/core/download.go b/cli/core/download.go
index 0c7b4227710..273c66b48df 100644
--- a/cli/core/download.go
+++ b/cli/core/download.go
@@ -66,8 +66,7 @@ func runDownloadCommand(cmd *cobra.Command, args []string) {
 			Architecture:    platformRef.Architecture,
 			Version:         platformRef.Version,
 		}
-		_, err := core.PlatformDownload(context.Background(), platformDownloadreq, output.ProgressBar(),
-			globals.NewHTTPClientHeader())
+		_, err := core.PlatformDownload(context.Background(), platformDownloadreq, output.ProgressBar())
 		if err != nil {
 			feedback.Errorf("Error downloading %s: %v", args[i], err)
 			os.Exit(errorcodes.ErrNetwork)
diff --git a/cli/core/install.go b/cli/core/install.go
index 62a8eb6ed7b..011ad7679bd 100644
--- a/cli/core/install.go
+++ b/cli/core/install.go
@@ -67,8 +67,7 @@ func runInstallCommand(cmd *cobra.Command, args []string) {
 			Architecture:    platformRef.Architecture,
 			Version:         platformRef.Version,
 		}
-		_, err := core.PlatformInstall(context.Background(), plattformInstallReq, output.ProgressBar(),
-			output.TaskProgress(), globals.NewHTTPClientHeader())
+		_, err := core.PlatformInstall(context.Background(), plattformInstallReq, output.ProgressBar(), output.TaskProgress())
 		if err != nil {
 			feedback.Errorf("Error during install: %v", err)
 			os.Exit(errorcodes.ErrGeneric)
diff --git a/cli/core/upgrade.go b/cli/core/upgrade.go
index 9c7cfdfcfa8..febc1bcebcf 100644
--- a/cli/core/upgrade.go
+++ b/cli/core/upgrade.go
@@ -93,7 +93,7 @@ func runUpgradeCommand(cmd *cobra.Command, args []string) {
 			Architecture:    platformRef.Architecture,
 		}
 
-		_, err := core.PlatformUpgrade(context.Background(), r, output.ProgressBar(), output.TaskProgress(), globals.NewHTTPClientHeader())
+		_, err := core.PlatformUpgrade(context.Background(), r, output.ProgressBar(), output.TaskProgress())
 		if err == core.ErrAlreadyLatest {
 			feedback.Printf("Platform %s is already at the latest version", platformRef)
 		} else if err != nil {
diff --git a/cli/daemon/daemon.go b/cli/daemon/daemon.go
index 5fa00ca20ca..58d23385fea 100644
--- a/cli/daemon/daemon.go
+++ b/cli/daemon/daemon.go
@@ -21,9 +21,7 @@ import (
 	"io"
 	"io/ioutil"
 	"net"
-	"net/http"
 	"os"
-	"runtime"
 	"syscall"
 
 	"github.com/arduino/arduino-cli/cli/errorcodes"
@@ -67,26 +65,15 @@ func runDaemonCommand(cmd *cobra.Command, args []string) {
 		stats.Incr("daemon", stats.T("success", "true"))
 		defer stats.Flush()
 	}
-
 	port := viper.GetString("daemon.port")
 	s := grpc.NewServer()
 
-	// Compose user agent header
-	headers := http.Header{
-		"User-Agent": []string{
-			fmt.Sprintf("%s/%s daemon (%s; %s; %s) Commit:%s",
-				globals.VersionInfo.Application,
-				globals.VersionInfo.VersionString,
-				runtime.GOARCH,
-				runtime.GOOS,
-				runtime.Version(),
-				globals.VersionInfo.Commit),
-		},
-	}
-	// Register the commands service
+	// Set specific user-agent for the daemon
+	viper.Set("network.user_agent_ext", "daemon")
+
+	// register the commands service
 	srv_commands.RegisterArduinoCoreServer(s, &daemon.ArduinoCoreServerImpl{
-		DownloaderHeaders: headers,
-		VersionString:     globals.VersionInfo.VersionString,
+		VersionString: globals.VersionInfo.VersionString,
 	})
 
 	// Register the monitors service
diff --git a/cli/globals/globals.go b/cli/globals/globals.go
index 0d20aac245e..5222590dc85 100644
--- a/cli/globals/globals.go
+++ b/cli/globals/globals.go
@@ -33,8 +33,16 @@ var (
 )
 
 // NewHTTPClientHeader returns the http.Header object that must be used by the clients inside the downloaders
-func NewHTTPClientHeader() http.Header {
-	userAgentValue := fmt.Sprintf("%s/%s (%s; %s; %s) Commit:%s", VersionInfo.Application,
-		VersionInfo.VersionString, runtime.GOARCH, runtime.GOOS, runtime.Version(), VersionInfo.Commit)
+// and adds the subComponent if specified
+func NewHTTPClientHeader(subComponent string) http.Header {
+	if subComponent != "" {
+		subComponent = " " + subComponent
+	}
+	userAgentValue := fmt.Sprintf("%s/%s%s (%s; %s; %s) Commit:%s",
+		VersionInfo.Application,
+		VersionInfo.VersionString,
+		subComponent,
+		runtime.GOARCH, runtime.GOOS, runtime.Version(),
+		VersionInfo.Commit)
 	return http.Header{"User-Agent": []string{userAgentValue}}
 }
diff --git a/cli/instance/instance.go b/cli/instance/instance.go
index 06f8e94ce11..37c0d355323 100644
--- a/cli/instance/instance.go
+++ b/cli/instance/instance.go
@@ -18,7 +18,6 @@ package instance
 import (
 	"context"
 
-	"github.com/arduino/arduino-cli/cli/globals"
 	"github.com/arduino/arduino-cli/cli/output"
 	"github.com/arduino/arduino-cli/commands"
 	rpc "github.com/arduino/arduino-cli/rpc/commands"
@@ -45,8 +44,7 @@ func CreateInstance() (*rpc.Instance, error) {
 
 func getInitResponse() (*rpc.InitResp, error) {
 	// invoke Init()
-	resp, err := commands.Init(context.Background(), &rpc.InitReq{},
-		output.ProgressBar(), output.TaskProgress(), globals.NewHTTPClientHeader())
+	resp, err := commands.Init(context.Background(), &rpc.InitReq{}, output.ProgressBar(), output.TaskProgress())
 
 	// Init() failed
 	if err != nil {
diff --git a/cli/lib/download.go b/cli/lib/download.go
index b1d1e012f5b..2419df395b4 100644
--- a/cli/lib/download.go
+++ b/cli/lib/download.go
@@ -21,7 +21,6 @@ import (
 
 	"github.com/arduino/arduino-cli/cli/errorcodes"
 	"github.com/arduino/arduino-cli/cli/feedback"
-	"github.com/arduino/arduino-cli/cli/globals"
 	"github.com/arduino/arduino-cli/cli/instance"
 	"github.com/arduino/arduino-cli/cli/output"
 	"github.com/arduino/arduino-cli/commands/lib"
@@ -57,8 +56,7 @@ func runDownloadCommand(cmd *cobra.Command, args []string) {
 			Name:     library.Name,
 			Version:  library.Version,
 		}
-		_, err := lib.LibraryDownload(context.Background(), libraryDownloadReq, output.ProgressBar(),
-			globals.NewHTTPClientHeader())
+		_, err := lib.LibraryDownload(context.Background(), libraryDownloadReq, output.ProgressBar())
 		if err != nil {
 			feedback.Errorf("Error downloading %s: %v", library, err)
 			os.Exit(errorcodes.ErrNetwork)
diff --git a/cli/lib/install.go b/cli/lib/install.go
index c9a0732d96b..8ed0bf64ab6 100644
--- a/cli/lib/install.go
+++ b/cli/lib/install.go
@@ -21,7 +21,6 @@ import (
 
 	"github.com/arduino/arduino-cli/cli/errorcodes"
 	"github.com/arduino/arduino-cli/cli/feedback"
-	"github.com/arduino/arduino-cli/cli/globals"
 	"github.com/arduino/arduino-cli/cli/instance"
 	"github.com/arduino/arduino-cli/cli/output"
 	"github.com/arduino/arduino-cli/commands/lib"
@@ -95,8 +94,7 @@ func runInstallCommand(cmd *cobra.Command, args []string) {
 			Name:     library.Name,
 			Version:  library.VersionRequired,
 		}
-		err := lib.LibraryInstall(context.Background(), libraryInstallReq, output.ProgressBar(),
-			output.TaskProgress(), globals.NewHTTPClientHeader())
+		err := lib.LibraryInstall(context.Background(), libraryInstallReq, output.ProgressBar(), output.TaskProgress())
 		if err != nil {
 			feedback.Errorf("Error installing %s: %v", library, err)
 			os.Exit(errorcodes.ErrGeneric)
diff --git a/cli/lib/upgrade.go b/cli/lib/upgrade.go
index 584fa711c5a..7da8fe87856 100644
--- a/cli/lib/upgrade.go
+++ b/cli/lib/upgrade.go
@@ -20,7 +20,6 @@ import (
 
 	"github.com/arduino/arduino-cli/cli/errorcodes"
 	"github.com/arduino/arduino-cli/cli/feedback"
-	"github.com/arduino/arduino-cli/cli/globals"
 	"github.com/arduino/arduino-cli/cli/instance"
 	"github.com/arduino/arduino-cli/cli/output"
 	"github.com/arduino/arduino-cli/commands/lib"
@@ -48,13 +47,13 @@ func runUpgradeCommand(cmd *cobra.Command, args []string) {
 	instance := instance.CreateInstanceIgnorePlatformIndexErrors()
 
 	if len(args) == 0 {
-		err := lib.LibraryUpgradeAll(instance.Id, output.ProgressBar(), output.TaskProgress(), globals.NewHTTPClientHeader())
+		err := lib.LibraryUpgradeAll(instance.Id, output.ProgressBar(), output.TaskProgress())
 		if err != nil {
 			feedback.Errorf("Error upgrading libraries: %v", err)
 			os.Exit(errorcodes.ErrGeneric)
 		}
 	} else {
-		err := lib.LibraryUpgrade(instance.Id, args, output.ProgressBar(), output.TaskProgress(), globals.NewHTTPClientHeader())
+		err := lib.LibraryUpgrade(instance.Id, args, output.ProgressBar(), output.TaskProgress())
 		if err != nil {
 			feedback.Errorf("Error upgrading libraries: %v", err)
 			os.Exit(errorcodes.ErrGeneric)
diff --git a/commands/board/list.go b/commands/board/list.go
index 0ec7ba6ec64..b77b743a654 100644
--- a/commands/board/list.go
+++ b/commands/board/list.go
@@ -51,9 +51,11 @@ func apiByVidPid(vid, pid string) ([]*rpc.BoardListItem, error) {
 	url := fmt.Sprintf("%s/%s/%s", vidPidURL, vid, pid)
 	retVal := []*rpc.BoardListItem{}
 	req, _ := http.NewRequest("GET", url, nil)
-	req.Header = globals.NewHTTPClientHeader()
+	req.Header = globals.NewHTTPClientHeader("")
 	req.Header.Set("Content-Type", "application/json")
 
+	// TODO: use proxy if set
+
 	if res, err := http.DefaultClient.Do(req); err == nil {
 		if res.StatusCode >= 400 {
 			if res.StatusCode == 404 {
diff --git a/commands/bundled_tools.go b/commands/bundled_tools.go
index 8e6398762be..b8ba834b8a0 100644
--- a/commands/bundled_tools.go
+++ b/commands/bundled_tools.go
@@ -17,7 +17,6 @@ package commands
 
 import (
 	"fmt"
-	"net/http"
 
 	"github.com/arduino/arduino-cli/arduino/cores"
 	"github.com/arduino/arduino-cli/arduino/cores/packagemanager"
@@ -25,9 +24,12 @@ import (
 )
 
 // DownloadToolRelease downloads a ToolRelease
-func DownloadToolRelease(pm *packagemanager.PackageManager, toolRelease *cores.ToolRelease,
-	downloadCB DownloadProgressCB, downloaderHeaders http.Header) error {
-	resp, err := pm.DownloadToolRelease(toolRelease, downloaderHeaders)
+func DownloadToolRelease(pm *packagemanager.PackageManager, toolRelease *cores.ToolRelease, downloadCB DownloadProgressCB) error {
+	config, err := GetDownloaderConfig()
+	if err != nil {
+		return err
+	}
+	resp, err := pm.DownloadToolRelease(toolRelease, config)
 	if err != nil {
 		return err
 	}
diff --git a/commands/core/download.go b/commands/core/download.go
index 2bc848cae7e..2de0232d008 100644
--- a/commands/core/download.go
+++ b/commands/core/download.go
@@ -19,7 +19,6 @@ import (
 	"context"
 	"errors"
 	"fmt"
-	"net/http"
 
 	"github.com/arduino/arduino-cli/arduino/cores"
 	"github.com/arduino/arduino-cli/arduino/cores/packagemanager"
@@ -28,8 +27,7 @@ import (
 )
 
 // PlatformDownload FIXMEDOC
-func PlatformDownload(ctx context.Context, req *rpc.PlatformDownloadReq, downloadCB commands.DownloadProgressCB,
-	downloaderHeaders http.Header) (*rpc.PlatformDownloadResp, error) {
+func PlatformDownload(ctx context.Context, req *rpc.PlatformDownloadReq, downloadCB commands.DownloadProgressCB) (*rpc.PlatformDownloadResp, error) {
 	pm := commands.GetPackageManager(req.GetInstance().GetId())
 	if pm == nil {
 		return nil, errors.New("invalid instance")
@@ -49,13 +47,13 @@ func PlatformDownload(ctx context.Context, req *rpc.PlatformDownloadReq, downloa
 		return nil, fmt.Errorf("find platform dependencies: %s", err)
 	}
 
-	err = downloadPlatform(pm, platform, downloadCB, downloaderHeaders)
+	err = downloadPlatform(pm, platform, downloadCB)
 	if err != nil {
 		return nil, err
 	}
 
 	for _, tool := range tools {
-		err := downloadTool(pm, tool, downloadCB, downloaderHeaders)
+		err := downloadTool(pm, tool, downloadCB)
 		if err != nil {
 			return nil, fmt.Errorf("downloading tool %s: %s", tool, err)
 		}
@@ -64,22 +62,24 @@ func PlatformDownload(ctx context.Context, req *rpc.PlatformDownloadReq, downloa
 	return &rpc.PlatformDownloadResp{}, nil
 }
 
-func downloadPlatform(pm *packagemanager.PackageManager, platformRelease *cores.PlatformRelease,
-	downloadCB commands.DownloadProgressCB, downloaderHeaders http.Header) error {
+func downloadPlatform(pm *packagemanager.PackageManager, platformRelease *cores.PlatformRelease, downloadCB commands.DownloadProgressCB) error {
 	// Download platform
-	resp, err := pm.DownloadPlatformRelease(platformRelease, downloaderHeaders)
+	config, err := commands.GetDownloaderConfig()
+	if err != nil {
+		return err
+	}
+	resp, err := pm.DownloadPlatformRelease(platformRelease, config)
 	if err != nil {
 		return err
 	}
 	return commands.Download(resp, platformRelease.String(), downloadCB)
 }
 
-func downloadTool(pm *packagemanager.PackageManager, tool *cores.ToolRelease, downloadCB commands.DownloadProgressCB,
-	downloaderHeaders http.Header) error {
+func downloadTool(pm *packagemanager.PackageManager, tool *cores.ToolRelease, downloadCB commands.DownloadProgressCB) error {
 	// Check if tool has a flavor available for the current OS
 	if tool.GetCompatibleFlavour() == nil {
 		return fmt.Errorf("tool %s not available for the current OS", tool)
 	}
 
-	return commands.DownloadToolRelease(pm, tool, downloadCB, downloaderHeaders)
+	return commands.DownloadToolRelease(pm, tool, downloadCB)
 }
diff --git a/commands/core/install.go b/commands/core/install.go
index bf01129effc..0d2e49deb73 100644
--- a/commands/core/install.go
+++ b/commands/core/install.go
@@ -19,7 +19,6 @@ import (
 	"context"
 	"errors"
 	"fmt"
-	"net/http"
 
 	"github.com/arduino/arduino-cli/arduino/cores"
 	"github.com/arduino/arduino-cli/arduino/cores/packagemanager"
@@ -29,7 +28,7 @@ import (
 
 // PlatformInstall FIXMEDOC
 func PlatformInstall(ctx context.Context, req *rpc.PlatformInstallReq,
-	downloadCB commands.DownloadProgressCB, taskCB commands.TaskProgressCB, downloaderHeaders http.Header) (*rpc.PlatformInstallResp, error) {
+	downloadCB commands.DownloadProgressCB, taskCB commands.TaskProgressCB) (*rpc.PlatformInstallResp, error) {
 
 	pm := commands.GetPackageManager(req.GetInstance().GetId())
 	if pm == nil {
@@ -50,7 +49,7 @@ func PlatformInstall(ctx context.Context, req *rpc.PlatformInstallReq,
 		return nil, fmt.Errorf("finding platform dependencies: %s", err)
 	}
 
-	err = installPlatform(pm, platform, tools, downloadCB, taskCB, downloaderHeaders)
+	err = installPlatform(pm, platform, tools, downloadCB, taskCB)
 	if err != nil {
 		return nil, err
 	}
@@ -65,7 +64,7 @@ func PlatformInstall(ctx context.Context, req *rpc.PlatformInstallReq,
 
 func installPlatform(pm *packagemanager.PackageManager,
 	platformRelease *cores.PlatformRelease, requiredTools []*cores.ToolRelease,
-	downloadCB commands.DownloadProgressCB, taskCB commands.TaskProgressCB, downloaderHeaders http.Header) error {
+	downloadCB commands.DownloadProgressCB, taskCB commands.TaskProgressCB) error {
 	log := pm.Log.WithField("platform", platformRelease)
 
 	// Prerequisite checks before install
@@ -87,9 +86,9 @@ func installPlatform(pm *packagemanager.PackageManager,
 	// Package download
 	taskCB(&rpc.TaskProgress{Name: "Downloading packages"})
 	for _, tool := range toolsToInstall {
-		downloadTool(pm, tool, downloadCB, downloaderHeaders)
+		downloadTool(pm, tool, downloadCB)
 	}
-	downloadPlatform(pm, platformRelease, downloadCB, downloaderHeaders)
+	downloadPlatform(pm, platformRelease, downloadCB)
 	taskCB(&rpc.TaskProgress{Completed: true})
 
 	// Install tools first
diff --git a/commands/core/upgrade.go b/commands/core/upgrade.go
index 392e8bf4454..1297496da1c 100644
--- a/commands/core/upgrade.go
+++ b/commands/core/upgrade.go
@@ -19,7 +19,6 @@ import (
 	"context"
 	"errors"
 	"fmt"
-	"net/http"
 
 	"github.com/arduino/arduino-cli/arduino/cores/packagemanager"
 	"github.com/arduino/arduino-cli/commands"
@@ -34,7 +33,7 @@ var (
 
 // PlatformUpgrade FIXMEDOC
 func PlatformUpgrade(ctx context.Context, req *rpc.PlatformUpgradeReq,
-	downloadCB commands.DownloadProgressCB, taskCB commands.TaskProgressCB, downloaderHeaders http.Header) (*rpc.PlatformUpgradeResp, error) {
+	downloadCB commands.DownloadProgressCB, taskCB commands.TaskProgressCB) (*rpc.PlatformUpgradeResp, error) {
 
 	pm := commands.GetPackageManager(req.GetInstance().GetId())
 	if pm == nil {
@@ -46,7 +45,7 @@ func PlatformUpgrade(ctx context.Context, req *rpc.PlatformUpgradeReq,
 		Package:              req.PlatformPackage,
 		PlatformArchitecture: req.Architecture,
 	}
-	if err := upgradePlatform(pm, ref, downloadCB, taskCB, downloaderHeaders); err != nil {
+	if err := upgradePlatform(pm, ref, downloadCB, taskCB); err != nil {
 		return nil, err
 	}
 
@@ -58,7 +57,7 @@ func PlatformUpgrade(ctx context.Context, req *rpc.PlatformUpgradeReq,
 }
 
 func upgradePlatform(pm *packagemanager.PackageManager, platformRef *packagemanager.PlatformReference,
-	downloadCB commands.DownloadProgressCB, taskCB commands.TaskProgressCB, downloaderHeaders http.Header) error {
+	downloadCB commands.DownloadProgressCB, taskCB commands.TaskProgressCB) error {
 	if platformRef.PlatformVersion != nil {
 		return fmt.Errorf("upgrade doesn't accept parameters with version")
 	}
@@ -85,7 +84,7 @@ func upgradePlatform(pm *packagemanager.PackageManager, platformRef *packagemana
 		if err != nil {
 			return fmt.Errorf("platform %s is not installed", platformRef)
 		}
-		err = installPlatform(pm, platform, tools, downloadCB, taskCB, downloaderHeaders)
+		err = installPlatform(pm, platform, tools, downloadCB, taskCB)
 		if err != nil {
 			return err
 		}
diff --git a/commands/daemon/daemon.go b/commands/daemon/daemon.go
index 579e4abd0f2..2dd088beff9 100644
--- a/commands/daemon/daemon.go
+++ b/commands/daemon/daemon.go
@@ -19,7 +19,6 @@ package daemon
 
 import (
 	"context"
-	"net/http"
 
 	"github.com/arduino/arduino-cli/arduino/utils"
 	"github.com/arduino/arduino-cli/commands"
@@ -33,8 +32,7 @@ import (
 
 // ArduinoCoreServerImpl FIXMEDOC
 type ArduinoCoreServerImpl struct {
-	DownloaderHeaders http.Header
-	VersionString     string
+	VersionString string
 }
 
 // BoardDetails FIXMEDOC
@@ -108,7 +106,6 @@ func (s *ArduinoCoreServerImpl) Init(req *rpc.InitReq, stream rpc.ArduinoCore_In
 	resp, err := commands.Init(stream.Context(), req,
 		func(p *rpc.DownloadProgress) { stream.Send(&rpc.InitResp{DownloadProgress: p}) },
 		func(p *rpc.TaskProgress) { stream.Send(&rpc.InitResp{TaskProgress: p}) },
-		s.DownloaderHeaders,
 	)
 	if err != nil {
 		return err
@@ -140,7 +137,6 @@ func (s *ArduinoCoreServerImpl) PlatformInstall(req *rpc.PlatformInstallReq, str
 		stream.Context(), req,
 		func(p *rpc.DownloadProgress) { stream.Send(&rpc.PlatformInstallResp{Progress: p}) },
 		func(p *rpc.TaskProgress) { stream.Send(&rpc.PlatformInstallResp{TaskProgress: p}) },
-		s.DownloaderHeaders,
 	)
 	if err != nil {
 		return err
@@ -153,7 +149,6 @@ func (s *ArduinoCoreServerImpl) PlatformDownload(req *rpc.PlatformDownloadReq, s
 	resp, err := core.PlatformDownload(
 		stream.Context(), req,
 		func(p *rpc.DownloadProgress) { stream.Send(&rpc.PlatformDownloadResp{Progress: p}) },
-		s.DownloaderHeaders,
 	)
 	if err != nil {
 		return err
@@ -179,7 +174,6 @@ func (s *ArduinoCoreServerImpl) PlatformUpgrade(req *rpc.PlatformUpgradeReq, str
 		stream.Context(), req,
 		func(p *rpc.DownloadProgress) { stream.Send(&rpc.PlatformUpgradeResp{Progress: p}) },
 		func(p *rpc.TaskProgress) { stream.Send(&rpc.PlatformUpgradeResp{TaskProgress: p}) },
-		s.DownloaderHeaders,
 	)
 	if err != nil {
 		return err
@@ -227,7 +221,6 @@ func (s *ArduinoCoreServerImpl) LibraryDownload(req *rpc.LibraryDownloadReq, str
 	resp, err := lib.LibraryDownload(
 		stream.Context(), req,
 		func(p *rpc.DownloadProgress) { stream.Send(&rpc.LibraryDownloadResp{Progress: p}) },
-		s.DownloaderHeaders,
 	)
 	if err != nil {
 		return err
@@ -241,7 +234,6 @@ func (s *ArduinoCoreServerImpl) LibraryInstall(req *rpc.LibraryInstallReq, strea
 		stream.Context(), req,
 		func(p *rpc.DownloadProgress) { stream.Send(&rpc.LibraryInstallResp{Progress: p}) },
 		func(p *rpc.TaskProgress) { stream.Send(&rpc.LibraryInstallResp{TaskProgress: p}) },
-		s.DownloaderHeaders,
 	)
 	if err != nil {
 		return err
@@ -265,7 +257,6 @@ func (s *ArduinoCoreServerImpl) LibraryUpgradeAll(req *rpc.LibraryUpgradeAllReq,
 	err := lib.LibraryUpgradeAll(req.GetInstance().GetId(),
 		func(p *rpc.DownloadProgress) { stream.Send(&rpc.LibraryUpgradeAllResp{Progress: p}) },
 		func(p *rpc.TaskProgress) { stream.Send(&rpc.LibraryUpgradeAllResp{TaskProgress: p}) },
-		s.DownloaderHeaders,
 	)
 	if err != nil {
 		return err
diff --git a/commands/download.go b/commands/download.go
new file mode 100644
index 00000000000..e049faa76ee
--- /dev/null
+++ b/commands/download.go
@@ -0,0 +1,71 @@
+// This file is part of arduino-cli.
+//
+// Copyright 2020 ARDUINO SA (http://www.arduino.cc/)
+//
+// This software is released under the GNU General Public License version 3,
+// which covers the main part of arduino-cli.
+// The terms of this license can be found at:
+// https://www.gnu.org/licenses/gpl-3.0.en.html
+//
+// You can be released from the requirements of the above licenses by purchasing
+// a commercial license. Buying such a license is mandatory if you want to
+// modify or otherwise use the software for commercial activities involving the
+// Arduino software without disclosing the source code of your own applications.
+// To purchase a commercial license, send an email to license@arduino.cc.
+
+package commands
+
+import (
+	"net/url"
+	"time"
+
+	"github.com/arduino/arduino-cli/cli/globals"
+	rpc "github.com/arduino/arduino-cli/rpc/commands"
+	"github.com/pkg/errors"
+	"github.com/sirupsen/logrus"
+	"github.com/spf13/viper"
+	"go.bug.st/downloader"
+)
+
+// GetDownloaderConfig returns the downloader configuration based on
+// current settings.
+func GetDownloaderConfig() (*downloader.Config, error) {
+	res := &downloader.Config{
+		RequestHeaders: globals.NewHTTPClientHeader(viper.GetString("network.user_agent_ext")),
+	}
+	if viper.IsSet("network.proxy") {
+		proxy := viper.GetString("network.proxy")
+		if _, err := url.Parse(proxy); err != nil {
+			return nil, errors.New("Invalid network.proxy '" + proxy + "': " + err.Error())
+		}
+		res.ProxyURL = proxy
+		logrus.Infof("Using proxy %s", proxy)
+	}
+	return res, nil
+}
+
+// Download performs a download loop using the provided downloader.Downloader.
+// Messages are passed back to the DownloadProgressCB using label as text for the File field.
+func Download(d *downloader.Downloader, label string, downloadCB DownloadProgressCB) error {
+	if d == nil {
+		// This signal means that the file is already downloaded
+		downloadCB(&rpc.DownloadProgress{
+			File:      label,
+			Completed: true,
+		})
+		return nil
+	}
+	downloadCB(&rpc.DownloadProgress{
+		File:      label,
+		Url:       d.URL,
+		TotalSize: d.Size(),
+	})
+	d.RunAndPoll(func(downloaded int64) {
+		downloadCB(&rpc.DownloadProgress{Downloaded: downloaded})
+	}, 250*time.Millisecond)
+	if d.Error() != nil {
+		return d.Error()
+	}
+	downloadCB(&rpc.DownloadProgress{Completed: true})
+	return nil
+}
diff --git a/commands/instances.go b/commands/instances.go
index a995a525164..277139a1ca1 100644
--- a/commands/instances.go
+++ b/commands/instances.go
@@ -19,10 +19,8 @@ import (
 	"context"
 	"fmt"
 	"io/ioutil"
-	"net/http"
 	"net/url"
 	"path"
-	"time"
 
 	"github.com/arduino/arduino-cli/arduino/cores"
 	"github.com/arduino/arduino-cli/arduino/cores/packageindex"
@@ -89,13 +87,12 @@ func GetLibraryManager(instanceID int32) *librariesmanager.LibrariesManager {
 	return i.lm
 }
 
-func (instance *CoreInstance) installToolIfMissing(tool *cores.ToolRelease, downloadCB DownloadProgressCB,
-	taskCB TaskProgressCB, downloaderHeaders http.Header) (bool, error) {
+func (instance *CoreInstance) installToolIfMissing(tool *cores.ToolRelease, downloadCB DownloadProgressCB, taskCB TaskProgressCB) (bool, error) {
 	if tool.IsInstalled() {
 		return false, nil
 	}
 	taskCB(&rpc.TaskProgress{Name: "Downloading missing tool " + tool.String()})
-	if err := DownloadToolRelease(instance.PackageManager, tool, downloadCB, downloaderHeaders); err != nil {
+	if err := DownloadToolRelease(instance.PackageManager, tool, downloadCB); err != nil {
 		return false, fmt.Errorf("downloading %s tool: %s", tool, err)
 	}
 	taskCB(&rpc.TaskProgress{Completed: true})
@@ -105,18 +102,17 @@ func (instance *CoreInstance) installToolIfMissing(tool *cores.ToolRelease, down
 	return true, nil
 }
 
-func (instance *CoreInstance) checkForBuiltinTools(downloadCB DownloadProgressCB, taskCB TaskProgressCB,
-	downloaderHeaders http.Header) error {
+func (instance *CoreInstance) checkForBuiltinTools(downloadCB DownloadProgressCB, taskCB TaskProgressCB) error {
 	// Check for ctags tool
 	ctags, _ := getBuiltinCtagsTool(instance.PackageManager)
-	ctagsInstalled, err := instance.installToolIfMissing(ctags, downloadCB, taskCB, downloaderHeaders)
+	ctagsInstalled, err := instance.installToolIfMissing(ctags, downloadCB, taskCB)
 	if err != nil {
 		return err
 	}
 
 	// Check for bultin serial-discovery tool
 	serialDiscoveryTool, _ := getBuiltinSerialDiscoveryTool(instance.PackageManager)
-	serialDiscoveryInstalled, err := instance.installToolIfMissing(serialDiscoveryTool, downloadCB, taskCB, downloaderHeaders)
+	serialDiscoveryInstalled, err := instance.installToolIfMissing(serialDiscoveryTool, downloadCB, taskCB)
 	if err != nil {
 		return err
 	}
@@ -130,9 +126,7 @@ func (instance *CoreInstance) checkForBuiltinTools(downloadCB DownloadProgressCB
 }
 
 // Init FIXMEDOC
-func Init(ctx context.Context, req *rpc.InitReq, downloadCB DownloadProgressCB, taskCB TaskProgressCB,
-	downloaderHeaders http.Header) (*rpc.InitResp, error) {
-
+func Init(ctx context.Context, req *rpc.InitReq, downloadCB DownloadProgressCB, taskCB TaskProgressCB) (*rpc.InitResp, error) {
 	res, err := createInstance(ctx, req.GetLibraryManagerOnly())
 	if err != nil {
 		return nil, fmt.Errorf("cannot initialize package manager: %s", err)
@@ -147,7 +141,7 @@ func Init(ctx context.Context, req *rpc.InitReq, downloadCB DownloadProgressCB,
 	instancesCount++
 	instances[handle] = instance
 
-	if err := instance.checkForBuiltinTools(downloadCB, taskCB, downloaderHeaders); err != nil {
+	if err := instance.checkForBuiltinTools(downloadCB, taskCB); err != nil {
 		return nil, err
 	}
 
@@ -176,7 +170,11 @@ func UpdateLibrariesIndex(ctx context.Context, req *rpc.UpdateLibrariesIndexReq,
 	if lm == nil {
 		return fmt.Errorf("invalid handle")
 	}
-	d, err := lm.UpdateIndex()
+	config, err := GetDownloaderConfig()
+	if err != nil {
+		return err
+	}
+	d, err := lm.UpdateIndex(config)
 	if err != nil {
 		return err
 	}
@@ -220,7 +218,11 @@ func UpdateIndex(ctx context.Context, req *rpc.UpdateIndexReq, downloadCB Downlo
 		tmp := paths.New(tmpFile.Name())
 		defer tmp.Remove()
 
-		d, err := downloader.Download(tmp.String(), URL.String())
+		config, err := GetDownloaderConfig()
+		if err != nil {
+			return nil, fmt.Errorf("downloading index %s: %s", URL, err)
+		}
+		d, err := downloader.DownloadWithConfig(tmp.String(), URL.String(), *config)
 		if err != nil {
 			return nil, fmt.Errorf("downloading index %s: %s", URL, err)
 		}
@@ -353,28 +355,3 @@ func createInstance(ctx context.Context, getLibOnly bool) (*createInstanceResult
 
 	return res, nil
 }
-
-// Download FIXMEDOC
-func Download(d *downloader.Downloader, label string, downloadCB DownloadProgressCB) error {
-	if d == nil {
-		// This signal means that the file is already downloaded
-		downloadCB(&rpc.DownloadProgress{
-			File:      label,
-			Completed: true,
-		})
-		return nil
-	}
-	downloadCB(&rpc.DownloadProgress{
-		File:      label,
-		Url:       d.URL,
-		TotalSize: d.Size(),
-	})
-	d.RunAndPoll(func(downloaded int64) {
-		downloadCB(&rpc.DownloadProgress{Downloaded: downloaded})
-	}, 250*time.Millisecond)
-	if d.Error() != nil {
-		return d.Error()
-	}
-	downloadCB(&rpc.DownloadProgress{Completed: true})
-	return nil
-}
diff --git a/commands/lib/download.go b/commands/lib/download.go
index a133c1fe886..117efb3aeeb 100644
--- a/commands/lib/download.go
+++ b/commands/lib/download.go
@@ -18,7 +18,6 @@ package lib
 import (
 	"context"
 	"fmt"
-	"net/http"
 
 	"github.com/arduino/arduino-cli/arduino/libraries/librariesindex"
 	"github.com/arduino/arduino-cli/arduino/libraries/librariesmanager"
@@ -28,8 +27,7 @@ import (
 )
 
 // LibraryDownload FIXMEDOC
-func LibraryDownload(ctx context.Context, req *rpc.LibraryDownloadReq, downloadCB commands.DownloadProgressCB,
-	downloaderHeaders http.Header) (*rpc.LibraryDownloadResp, error) {
+func LibraryDownload(ctx context.Context, req *rpc.LibraryDownloadReq, downloadCB commands.DownloadProgressCB) (*rpc.LibraryDownloadResp, error) {
 	logrus.Info("Executing `arduino lib download`")
 
 	lm := commands.GetLibraryManager(req.GetInstance().GetId())
@@ -41,7 +39,7 @@ func LibraryDownload(ctx context.Context, req *rpc.LibraryDownloadReq, downloadC
 		return nil, fmt.Errorf("looking for library: %s", err)
 	}
 
-	if err := downloadLibrary(lm, lib, downloadCB, func(*rpc.TaskProgress) {}, downloaderHeaders); err != nil {
+	if err := downloadLibrary(lm, lib, downloadCB, func(*rpc.TaskProgress) {}); err != nil {
 		return nil, err
 	}
 
@@ -49,10 +47,14 @@ func LibraryDownload(ctx context.Context, req *rpc.LibraryDownloadReq, downloadC
 }
 
 func downloadLibrary(lm *librariesmanager.LibrariesManager, libRelease *librariesindex.Release,
-	downloadCB commands.DownloadProgressCB, taskCB commands.TaskProgressCB, downloaderHeaders http.Header) error {
+	downloadCB commands.DownloadProgressCB, taskCB commands.TaskProgressCB) error {
 
 	taskCB(&rpc.TaskProgress{Name: "Downloading " + libRelease.String()})
-	if d, err := libRelease.Resource.Download(lm.DownloadsDir, downloaderHeaders); err != nil {
+	config, err := commands.GetDownloaderConfig()
+	if err != nil {
+		return err
+	}
+	if d, err := libRelease.Resource.Download(lm.DownloadsDir, config); err != nil {
 		return err
 	} else if err := commands.Download(d, libRelease.String(), downloadCB); err != nil {
 		return err
diff --git a/commands/lib/install.go b/commands/lib/install.go
index 714c8e352c8..93fad6f8664 100644
--- a/commands/lib/install.go
+++ b/commands/lib/install.go
@@ -18,7 +18,6 @@ package lib
 import (
 	"context"
 	"fmt"
-	"net/http"
 
 	"github.com/arduino/arduino-cli/arduino/libraries/librariesindex"
 	"github.com/arduino/arduino-cli/arduino/libraries/librariesmanager"
@@ -29,7 +28,7 @@ import (
 
 // LibraryInstall FIXMEDOC
 func LibraryInstall(ctx context.Context, req *rpc.LibraryInstallReq,
-	downloadCB commands.DownloadProgressCB, taskCB commands.TaskProgressCB, downloaderHeaders http.Header) error {
+	downloadCB commands.DownloadProgressCB, taskCB commands.TaskProgressCB) error {
 
 	lm := commands.GetLibraryManager(req.GetInstance().GetId())
 
@@ -38,7 +37,7 @@ func LibraryInstall(ctx context.Context, req *rpc.LibraryInstallReq,
 		return fmt.Errorf("looking for library: %s", err)
 	}
 
-	if err := downloadLibrary(lm, libRelease, downloadCB, taskCB, downloaderHeaders); err != nil {
+	if err := downloadLibrary(lm, libRelease, downloadCB, taskCB); err != nil {
 		return fmt.Errorf("downloading library: %s", err)
 	}
 
diff --git a/commands/lib/upgrade.go b/commands/lib/upgrade.go
index c991cee1399..d85526a5fab 100644
--- a/commands/lib/upgrade.go
+++ b/commands/lib/upgrade.go
@@ -17,7 +17,6 @@ package lib
 
 import (
 	"fmt"
-	"net/http"
 
 	"github.com/arduino/arduino-cli/arduino/libraries/librariesmanager"
 	"github.com/arduino/arduino-cli/commands"
@@ -25,11 +24,11 @@ import (
 
 // LibraryUpgradeAll upgrades all the available libraries
 func LibraryUpgradeAll(instanceID int32, downloadCB commands.DownloadProgressCB,
-	taskCB commands.TaskProgressCB, headers http.Header) error {
+	taskCB commands.TaskProgressCB) error {
 	// get the library manager
 	lm := commands.GetLibraryManager(instanceID)
 
-	if err := upgrade(lm, listLibraries(lm, true, true), downloadCB, taskCB, headers); err != nil {
+	if err := upgrade(lm, listLibraries(lm, true, true), downloadCB, taskCB); err != nil {
 		return err
 	}
 
@@ -42,7 +41,7 @@ func LibraryUpgradeAll(instanceID int32, downloadCB commands.DownloadProgressCB,
 
 // LibraryUpgrade upgrades only the given libraries
 func LibraryUpgrade(instanceID int32, libraryNames []string, downloadCB commands.DownloadProgressCB,
-	taskCB commands.TaskProgressCB, headers http.Header) error {
+	taskCB commands.TaskProgressCB) error {
 	// get the library manager
 	lm := commands.GetLibraryManager(instanceID)
 
@@ -50,16 +49,16 @@ func LibraryUpgrade(instanceID int32, libraryNames []string, downloadCB commands
 	libs := filterByName(listLibraries(lm, true, true), libraryNames)
 
 	// do it
-	return upgrade(lm, libs, downloadCB, taskCB, headers)
+	return upgrade(lm, libs, downloadCB, taskCB)
 }
 
 func upgrade(lm *librariesmanager.LibrariesManager, libs []*installedLib, downloadCB commands.DownloadProgressCB,
-	taskCB commands.TaskProgressCB, downloaderHeaders http.Header) error {
+	taskCB commands.TaskProgressCB) error {
 
 	// Go through the list and download them
 
 	for _, lib := range libs {
-		if err := downloadLibrary(lm, lib.Available, downloadCB, taskCB, downloaderHeaders); err != nil {
+		if err := downloadLibrary(lm, lib.Available, downloadCB, taskCB); err != nil {
 			return err
 		}
 	}
diff --git a/configuration/defaults.go b/configuration/defaults.go
index 262edca08d8..4ccf1c380b1 100644
--- a/configuration/defaults.go
+++ b/configuration/defaults.go
@@ -25,6 +25,7 @@ func setDefaults(dataDir, userDir string) {
 	// logging
 	viper.SetDefault("logging.level", "info")
 	viper.SetDefault("logging.format", "text")
+
 	// board manager
 	viper.SetDefault("board_manager.additional_urls", []string{})
 
diff --git a/go.mod b/go.mod
index 8add00a9c98..9589dbe49b9 100644
--- a/go.mod
+++ b/go.mod
@@ -38,7 +38,7 @@ require (
 	github.com/spf13/viper v1.6.2
 	github.com/stretchr/testify v1.4.0
 	go.bug.st/cleanup v1.0.0
-	go.bug.st/downloader v1.1.0
+	go.bug.st/downloader v1.2.0
 	go.bug.st/relaxed-semver v0.0.0-20190922224835-391e10178d18
 	go.bug.st/serial v1.0.0
 	go.bug.st/serial.v1 v0.0.0-20180827123349-5f7892a7bb45 // indirect
diff --git a/go.sum b/go.sum
index 46bfc061b4c..2f84109f8f6 100644
--- a/go.sum
+++ b/go.sum
@@ -189,6 +189,7 @@ github.com/spf13/viper v1.3.2/go.mod h1:ZiWeW+zYFKm7srdB9IoDzzZXaJaI5eL9QjNiN/DM
 github.com/spf13/viper v1.6.2 h1:7aKfF+e8/k68gda3LOjo5RxiUqddoFxVq4BKBPrxk5E=
 github.com/spf13/viper v1.6.2/go.mod h1:t3iDnF5Jlj76alVNuyFBk5oUMCvsrkbvZK0WQdfDi5k=
 github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
+github.com/stretchr/objx v0.1.1 h1:2vfRuCMp5sSVIDSqO8oNnWJq7mPa6KVP3iPIwFBuy8A=
 github.com/stretchr/objx v0.1.1/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
 github.com/stretchr/testify v1.2.2/go.mod h1:a8OnRcib4nhh0OaRAV+Yts87kKdq0PP7pXfy6kDkUVs=
 github.com/stretchr/testify v1.3.0 h1:TivCn/peBQ7UY8ooIcPgZFpTNSz0Q2U6UrFlUfqbe0Q=
@@ -204,8 +205,8 @@ github.com/xiang90/probing v0.0.0-20190116061207-43a291ad63a2/go.mod h1:UETIi67q
 github.com/xordataexchange/crypt v0.0.3-0.20170626215501-b2862e3d0a77/go.mod h1:aYKd//L2LvnjZzWKhF00oedf4jCCReLcmhLdhm1A27Q=
 go.bug.st/cleanup v1.0.0 h1:XVj1HZxkBXeq3gMT7ijWUpHyIC1j8XAoNSyQ06CskgA=
 go.bug.st/cleanup v1.0.0/go.mod h1:EqVmTg2IBk4znLbPD28xne3abjsJftMdqqJEjhn70bk=
-go.bug.st/downloader v1.1.0 h1:LipC9rqRCe8kwa+ah3ZDfCqneVaf34cB/TKjXZiZt54=
-go.bug.st/downloader v1.1.0/go.mod h1:l+RPbNbrTB+MoAIp8nrZsP22nRPDy26XJZQqmm4gNT4=
+go.bug.st/downloader v1.2.0 h1:YmXFTcTnm0v8WzAWHn2DyV46c/Izlc/gReXubc2oBho=
+go.bug.st/downloader v1.2.0/go.mod h1:l+RPbNbrTB+MoAIp8nrZsP22nRPDy26XJZQqmm4gNT4=
 go.bug.st/relaxed-semver v0.0.0-20190922224835-391e10178d18 h1:F1qxtaFuewctYc/SsHRn+Q7Dtwi+yJGPgVq8YLtQz98=
 go.bug.st/relaxed-semver v0.0.0-20190922224835-391e10178d18/go.mod h1:Cx1VqMtEhE9pIkEyUj3LVVVPkv89dgW8aCKrRPDR/uE=
 go.bug.st/serial v1.0.0 h1:ogEPzrllCsnG00EqKRjeYvPRsO7NJW6DqykzkdD6E/k=