diff --git a/build/build.xml b/build/build.xml
index 801ab814ee7..b77ffa7b5fb 100644
--- a/build/build.xml
+++ b/build/build.xml
@@ -326,8 +326,8 @@
 
     <!-- Unzip AVR tools -->
     <antcall target="unzip">
-      <param name="archive_file" value="${staging_folder}/avr-toolchain-mac32-gcc-4.8.1.zip" />
-      <param name="archive_url" value="http://downloads.arduino.cc/avr-toolchain-mac32-gcc-4.8.1.zip" />
+      <param name="archive_file" value="${staging_folder}/avr-toolchain-mac32-3.4.5.zip" />
+      <param name="archive_url" value="http://arduino.cc/download.php?f=/avr-toolchain-mac32-3.4.5.zip" />
       <param name="final_folder" value="${staging_folder}/work/${staging_hardware_folder}/tools/avr" />
       <param name="dest_folder" value="${staging_folder}/work/${staging_hardware_folder}/tools/avr" />
     </antcall>
@@ -344,7 +344,7 @@
 
     <antcall target="untar">
       <param name="archive_file" value="${staging_folder}/dist/gcc-arm-none-eabi-4.8.3-2014q1-mac.tar.gz" />
-      <param name="archive_url" value="http://downloads.arduino.cc/gcc-arm-none-eabi-4.8.3-2014q1-mac.tar.gz" />
+      <param name="archive_url" value="http://arduino.cc/download.php?f=/gcc-arm-none-eabi-4.8.3-2014q1-mac.tar.gz" />
       <param name="final_folder" value="${staging_folder}/work/${staging_hardware_folder}/tools/gcc-arm-none-eabi-4.8.3-2014q1" />
       <param name="dest_folder" value="${staging_folder}/work/${staging_hardware_folder}/tools/" />
     </antcall>
@@ -358,7 +358,7 @@
 
     <antcall target="unzip">
       <param name="archive_file" value="./libastylej-2.05.zip" />
-      <param name="archive_url" value="http://downloads.arduino.cc/libastylej-2.05.zip" />
+      <param name="archive_url" value="http://arduino.cc/download.php?f=/libastylej-2.05.zip" />
       <param name="final_folder" value="${staging_folder}/libastylej" />
       <param name="dest_folder" value="${staging_folder}" />
     </antcall>
@@ -594,7 +594,7 @@
 
     <antcall target="unzip">
       <param name="archive_file" value="./libastylej-2.05.zip" />
-      <param name="archive_url" value="http://downloads.arduino.cc/libastylej-2.05.zip" />
+      <param name="archive_url" value="http://arduino.cc/download.php?f=/libastylej-2.05.zip" />
       <param name="final_folder" value="${staging_folder}/libastylej" />
       <param name="dest_folder" value="${staging_folder}" />
     </antcall>
@@ -606,15 +606,15 @@
     <!-- Unzip ARM tools -->
     <antcall target="untar">
       <param name="archive_file" value="${staging_folder}/dist/gcc-arm-none-eabi-4.8.3-2014q1-linux32.tar.gz" />
-      <param name="archive_url" value="http://downloads.arduino.cc/gcc-arm-none-eabi-4.8.3-2014q1-linux32.tar.gz" />
+      <param name="archive_url" value="http://arduino.cc/download.php?f=/gcc-arm-none-eabi-4.8.3-2014q1-linux32.tar.gz" />
       <param name="final_folder" value="${staging_folder}/work/${staging_hardware_folder}/tools/gcc-arm-none-eabi-4.8.3-2014q1" />
       <param name="dest_folder" value="${staging_folder}/work/${staging_hardware_folder}/tools/" />
     </antcall>
 
     <!-- Unzip AVR tools -->
     <antcall target="unzip">
-      <param name="archive_file" value="${staging_folder}/avr-toolchain-linux32-gcc-4.8.1.zip" />
-      <param name="archive_url" value="http://downloads.arduino.cc/avr-toolchain-linux32-gcc-4.8.1.zip" />
+      <param name="archive_file" value="${staging_folder}/avr-toolchain-linux32-3.4.5.zip" />
+      <param name="archive_url" value="http://arduino.cc/download.php?f=/avr-toolchain-linux32-3.4.5.zip" />
       <param name="final_folder" value="${staging_folder}/work/${staging_hardware_folder}/tools/avr" />
       <param name="dest_folder" value="${staging_folder}/work/${staging_hardware_folder}/tools/avr" />
     </antcall>
@@ -624,15 +624,15 @@
     <!-- Unzip ARM tools -->
     <antcall target="untar">
       <param name="archive_file" value="${staging_folder}/dist/gcc-arm-none-eabi-4.8.3-2014q1-linux64.tar.gz" />
-      <param name="archive_url" value="http://downloads.arduino.cc/gcc-arm-none-eabi-4.8.3-2014q1-linux64.tar.gz" />
+      <param name="archive_url" value="http://arduino.cc/download.php?f=/gcc-arm-none-eabi-4.8.3-2014q1-linux64.tar.gz" />
       <param name="final_folder" value="${staging_folder}/work/${staging_hardware_folder}/tools/gcc-arm-none-eabi-4.8.3-2014q1" />
       <param name="dest_folder" value="${staging_folder}/work/${staging_hardware_folder}/tools/" />
     </antcall>
 
     <!-- Unzip AVR tools -->
     <antcall target="unzip">
-      <param name="archive_file" value="${staging_folder}/avr-toolchain-linux64-gcc-4.8.1.zip" />
-      <param name="archive_url" value="http://downloads.arduino.cc/avr-toolchain-linux64-gcc-4.8.1.zip" />
+      <param name="archive_file" value="${staging_folder}/avr-toolchain-linux64-3.4.5.zip" />
+      <param name="archive_url" value="http://arduino.cc/download.php?f=/avr-toolchain-linux64-3.4.5.zip" />
       <param name="final_folder" value="${staging_folder}/work/${staging_hardware_folder}/tools/avr" />
       <param name="dest_folder" value="${staging_folder}/work/${staging_hardware_folder}/tools/avr" />
     </antcall>
@@ -815,15 +815,15 @@
 
     <!-- Unzip AVR tools -->
     <antcall target="unzip">
-      <param name="archive_file" value="${staging_folder}/avr-toolchain-win32-gcc-4.8.1.zip" />
-      <param name="archive_url" value="http://downloads.arduino.cc/avr-toolchain-win32-gcc-4.8.1.zip" />
+      <param name="archive_file" value="${staging_folder}/avr-toolchain-win32-3.4.5.zip" />
+      <param name="archive_url" value="http://arduino.cc/download.php?f=/avr-toolchain-win32-3.4.5.zip" />
       <param name="final_folder" value="${staging_folder}/work/${staging_hardware_folder}/tools/avr" />
       <param name="dest_folder" value="${staging_folder}/work/${staging_hardware_folder}/tools/avr" />
     </antcall>
 
     <antcall target="unzip">
       <param name="archive_file" value="./libastylej-2.05.zip" />
-      <param name="archive_url" value="http://downloads.arduino.cc/libastylej-2.05.zip" />
+      <param name="archive_url" value="http://arduino.cc/download.php?f=/libastylej-2.05.zip" />
       <param name="final_folder" value="${staging_folder}/libastylej" />
       <param name="dest_folder" value="${staging_folder}" />
     </antcall>
@@ -869,7 +869,7 @@
     <!-- Unzip ARM toolchain -->
     <antcall target="untar">
       <param name="archive_file" value="${staging_folder}/dist/gcc-arm-none-eabi-4.8.3-2014q1-windows.tar.gz" />
-      <param name="archive_url" value="http://downloads.arduino.cc/gcc-arm-none-eabi-4.8.3-2014q1-windows.tar.gz" />
+      <param name="archive_url" value="http://arduino.cc/download.php?f=/gcc-arm-none-eabi-4.8.3-2014q1-windows.tar.gz" />
       <param name="final_folder" value="${staging_folder}/work/${staging_hardware_folder}/tools/gcc-arm-none-eabi-4.8.3-2014q1" />
       <param name="dest_folder" value="${staging_folder}/work/${staging_hardware_folder}/tools/" />
     </antcall>
@@ -888,7 +888,7 @@
   <target name="windows-dist" depends="windows-build"
 	  description="Create .zip files of windows version">
 
-    <get src="http://downloads.arduino.cc/jre_7u40_windows_i586.zip" dest="windows/jre.zip" usetimestamp="true" skipexisting="true" />
+    <get src="http://arduino.cc/download.php?f=/jre_7u40_windows_i586.zip" dest="windows/jre.zip" usetimestamp="true" skipexisting="true" />
 
     <unzip dest="windows/work" src="windows/jre.zip" overwrite="false"/>
 
diff --git a/build/linux/avr-toolchain-linux32-3.4.5.zip.sha b/build/linux/avr-toolchain-linux32-3.4.5.zip.sha
new file mode 100644
index 00000000000..aaf92d1e244
--- /dev/null
+++ b/build/linux/avr-toolchain-linux32-3.4.5.zip.sha
@@ -0,0 +1 @@
+7be134b7daae4160f069725ab4924759c213b171
diff --git a/build/linux/avr-toolchain-linux32-gcc-4.8.1.zip.sha b/build/linux/avr-toolchain-linux32-gcc-4.8.1.zip.sha
deleted file mode 100644
index 88d2ab8ea60..00000000000
--- a/build/linux/avr-toolchain-linux32-gcc-4.8.1.zip.sha
+++ /dev/null
@@ -1 +0,0 @@
-60f9edb4dd033109e22ee9e87cb6f45efd15882e
diff --git a/build/linux/avr-toolchain-linux64-3.4.5.zip.sha b/build/linux/avr-toolchain-linux64-3.4.5.zip.sha
new file mode 100644
index 00000000000..17c01c52880
--- /dev/null
+++ b/build/linux/avr-toolchain-linux64-3.4.5.zip.sha
@@ -0,0 +1 @@
+0c4f955273ba09fe9a5a9bd90b2e8713295ba4b4
diff --git a/build/linux/avr-toolchain-linux64-gcc-4.8.1.zip.sha b/build/linux/avr-toolchain-linux64-gcc-4.8.1.zip.sha
deleted file mode 100644
index 2cb2bdfec98..00000000000
--- a/build/linux/avr-toolchain-linux64-gcc-4.8.1.zip.sha
+++ /dev/null
@@ -1 +0,0 @@
-5b0131ac2ccf20637d16ecc40a0ef2fae48fe73a
diff --git a/build/macosx/avr-toolchain-mac32-3.4.5.zip.sha b/build/macosx/avr-toolchain-mac32-3.4.5.zip.sha
new file mode 100644
index 00000000000..ff372c9ef6b
--- /dev/null
+++ b/build/macosx/avr-toolchain-mac32-3.4.5.zip.sha
@@ -0,0 +1 @@
+7883269bd9ba654ed6ca943d983c02c8691b858b
diff --git a/build/macosx/avr-toolchain-mac32-gcc-4.8.1.zip.sha b/build/macosx/avr-toolchain-mac32-gcc-4.8.1.zip.sha
deleted file mode 100644
index 19cd41f7b1a..00000000000
--- a/build/macosx/avr-toolchain-mac32-gcc-4.8.1.zip.sha
+++ /dev/null
@@ -1 +0,0 @@
-c1c15b14ede121884d17c0360e1f1ad15fb5c98f
diff --git a/build/windows/avr-toolchain-win32-3.4.5.zip.sha b/build/windows/avr-toolchain-win32-3.4.5.zip.sha
new file mode 100644
index 00000000000..fd8cce89b8f
--- /dev/null
+++ b/build/windows/avr-toolchain-win32-3.4.5.zip.sha
@@ -0,0 +1 @@
+e089689f38dbd98acca2e7ae4e1219773afbeecd
diff --git a/build/windows/avr-toolchain-win32-gcc-4.8.1.zip.sha b/build/windows/avr-toolchain-win32-gcc-4.8.1.zip.sha
deleted file mode 100644
index e3946fb0d76..00000000000
--- a/build/windows/avr-toolchain-win32-gcc-4.8.1.zip.sha
+++ /dev/null
@@ -1 +0,0 @@
-21577a37f6f438a25903a3338c448385c0c87aeb
diff --git a/build/windows/dist/cyggcc_s-1.dll b/build/windows/dist/cyggcc_s-1.dll
deleted file mode 100644
index e71211d36ec..00000000000
Binary files a/build/windows/dist/cyggcc_s-1.dll and /dev/null differ
diff --git a/build/windows/dist/cygiconv-2.dll b/build/windows/dist/cygiconv-2.dll
deleted file mode 100644
index e6c2b5d9c14..00000000000
Binary files a/build/windows/dist/cygiconv-2.dll and /dev/null differ
diff --git a/build/windows/dist/cygwin1.dll b/build/windows/dist/cygwin1.dll
deleted file mode 100644
index 23a21dd1445..00000000000
Binary files a/build/windows/dist/cygwin1.dll and /dev/null differ
diff --git a/build/windows/dist/cygz.dll b/build/windows/dist/cygz.dll
deleted file mode 100644
index 98b8b828022..00000000000
Binary files a/build/windows/dist/cygz.dll and /dev/null differ