diff --git a/.gitmodules b/.gitmodules
index 4db100bcc246..72af6f16258c 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -190,3 +190,6 @@
 [submodule "community-build/community-projects/onnx-scala"]
 	path = community-build/community-projects/onnx-scala
 	url = https://github.com/dotty-staging/onnx-scala.git
+[submodule "community-build/community-projects/cask"]
+	path = community-build/community-projects/cask
+	url = https://github.com/dotty-staging/cask.git
diff --git a/community-build/community-projects/PPrint b/community-build/community-projects/PPrint
index 231bc187faad..bb5162249f9e 160000
--- a/community-build/community-projects/PPrint
+++ b/community-build/community-projects/PPrint
@@ -1 +1 @@
-Subproject commit 231bc187faad172b55af4ddc50c30228a56b2ebd
+Subproject commit bb5162249f9e40e925df49ad1467efd260a3eb2c
diff --git a/community-build/community-projects/cask b/community-build/community-projects/cask
new file mode 160000
index 000000000000..93c27abe583c
--- /dev/null
+++ b/community-build/community-projects/cask
@@ -0,0 +1 @@
+Subproject commit 93c27abe583c2b804e5ce66271440789fca0581a
diff --git a/community-build/community-projects/fansi b/community-build/community-projects/fansi
index 21d1db61a315..9f2881ff73aa 160000
--- a/community-build/community-projects/fansi
+++ b/community-build/community-projects/fansi
@@ -1 +1 @@
-Subproject commit 21d1db61a315b31636dfd6515f346454b21ac5f6
+Subproject commit 9f2881ff73aae30bc860e349bedeed0b4a8b590a
diff --git a/community-build/community-projects/geny b/community-build/community-projects/geny
index c511f4ad1ae2..474fc0c12314 160000
--- a/community-build/community-projects/geny
+++ b/community-build/community-projects/geny
@@ -1 +1 @@
-Subproject commit c511f4ad1ae2adf94bd55691bd8b4afed41213fc
+Subproject commit 474fc0c123144aef5e930be46d63e48b4571af3a
diff --git a/community-build/community-projects/os-lib b/community-build/community-projects/os-lib
index 1a848dc584dd..94d229becfed 160000
--- a/community-build/community-projects/os-lib
+++ b/community-build/community-projects/os-lib
@@ -1 +1 @@
-Subproject commit 1a848dc584ddfdcf48b7075a4292e09d0b8c00e0
+Subproject commit 94d229becfeda1a3b8bb05e3fade3e4fc9d6cf3b
diff --git a/community-build/community-projects/requests-scala b/community-build/community-projects/requests-scala
index 139dbe6418f1..162fcedd9a9d 160000
--- a/community-build/community-projects/requests-scala
+++ b/community-build/community-projects/requests-scala
@@ -1 +1 @@
-Subproject commit 139dbe6418f1ecee09b020086fc2fc9e844e57e3
+Subproject commit 162fcedd9a9d6ff2f5d75a2ec5dc2792ef1980a6
diff --git a/community-build/community-projects/sourcecode b/community-build/community-projects/sourcecode
index 1b8fcebec8c9..518af8532f3d 160000
--- a/community-build/community-projects/sourcecode
+++ b/community-build/community-projects/sourcecode
@@ -1 +1 @@
-Subproject commit 1b8fcebec8c9322a06498fd5e1086bfc5abee277
+Subproject commit 518af8532f3df346cf57d8e05d55c55ab5ad325d
diff --git a/community-build/community-projects/upickle b/community-build/community-projects/upickle
index 52e388109f3a..0213eea95b28 160000
--- a/community-build/community-projects/upickle
+++ b/community-build/community-projects/upickle
@@ -1 +1 @@
-Subproject commit 52e388109f3a03f63795e0aa9b17cf6453eac69d
+Subproject commit 0213eea95b282b1e961b1d5ad68031365c9a8bb2
diff --git a/community-build/community-projects/utest b/community-build/community-projects/utest
index fcc38cf2d01c..d31c98761a20 160000
--- a/community-build/community-projects/utest
+++ b/community-build/community-projects/utest
@@ -1 +1 @@
-Subproject commit fcc38cf2d01cbff99618c81be651e957b2b42e52
+Subproject commit d31c98761a204c91f0e06a4eaa8a45aa038d14b8
diff --git a/community-build/src/scala/dotty/communitybuild/projects.scala b/community-build/src/scala/dotty/communitybuild/projects.scala
index 415dbf973537..dc989d4bd65c 100644
--- a/community-build/src/scala/dotty/communitybuild/projects.scala
+++ b/community-build/src/scala/dotty/communitybuild/projects.scala
@@ -188,6 +188,18 @@ object projects:
     dependencies = List(geny, utest)
   )
 
+  lazy val upickleImplicits = MillCommunityProject(
+    project = "upickle",
+    baseCommand = s"implicits.jvm[$compilerVersion]",
+    dependencies = List(upickleCore, ujson)
+  )
+
+  lazy val upack = MillCommunityProject(
+    project = "upickle",
+    baseCommand = s"upack.jvm[$compilerVersion]",
+    dependencies = List(ujson, upickleCore)
+  )
+
   lazy val geny = MillCommunityProject(
     project = "geny",
     baseCommand = s"geny.jvm[$compilerVersion]",
@@ -214,6 +226,12 @@ object projects:
     dependencies = List(geny, utest, ujson, upickleCore)
   )
 
+  lazy val cask = MillCommunityProject(
+    project = "cask",
+    baseCommand = s"cask[$compilerVersion]",
+    dependencies = List(utest, geny, sourcecode, pprint, upickle, upickleImplicits, upack, requests)
+  )
+
   lazy val scas = MillCommunityProject(
     project = "scas",
     baseCommand = "scas.application"
@@ -631,10 +649,13 @@ def allProjects = List(
   projects.ujson,
   projects.upickle,
   projects.upickleCore,
+  projects.upickleImplicits,
+  projects.upack,
   projects.geny,
   projects.fansi,
   projects.pprint,
   projects.requests,
+  projects.cask,
   projects.scas,
   projects.intent,
   projects.algebra,