diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index c3b34ea640ca..2a139dfe9249 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -4,7 +4,7 @@ on: [push, pull_request]
 
 jobs:
   test:
-    runs-on: ubuntu-latest
+    runs-on: self-hosted
     container: akmetiuk/dotty:2020-02-12
 
     steps:
@@ -38,7 +38,7 @@ jobs:
           ./project/scripts/cmdTests
 
   test_bootstrapped:
-    runs-on: ubuntu-latest
+    runs-on: self-hosted
     container: akmetiuk/dotty:2020-02-12
 
     steps:
@@ -71,43 +71,43 @@ jobs:
           ./project/scripts/sbt ";dotty-bootstrapped/compile ;dotty-bootstrapped/test;sjsSandbox/run;sjsSandbox/test;sjsJUnitTests/test ;configureIDE"
           ./project/scripts/bootstrapCmdTests
 
-  # community_build:
-  #   runs-on: ubuntu-latest
-  #   container: akmetiuk/dotty:2020-02-12
-
-  #   steps:
-  #     - name: Git Checkout
-  #       uses: actions/checkout@v2
-
-  #     - name: Cache Ivy
-  #       uses: actions/cache@v1.1.2
-  #       with:
-  #         path: /root/.ivy2/cache
-  #         key: ${{ runner.os }}-ivy-${{ hashFiles('**/build.sbt') }}
-  #         restore-keys: ${{ runner.os }}-ivy-
-
-  #     - name: Cache SBT
-  #       uses: actions/cache@v1.1.2
-  #       with:
-  #         path: /root/.sbt
-  #         key: ${{ runner.os }}-sbt-${{ hashFiles('project/**') }}
-  #         restore-keys: ${{ runner.os }}-sbt-
-
-  #     - name: Cache Coursier and Mill
-  #       uses: actions/cache@v1.1.2
-  #       with:
-  #         path: /root/.cache
-  #         key: ${{ runner.os }}-general-${{ hashFiles('**/build.sbt') }}
-  #         restore-keys: ${{ runner.os }}-general-
-
-  #     - name: Test
-  #       run: |
-  #         git submodule sync
-  #         git submodule update --init --recursive --jobs 7
-  #         ./project/scripts/sbt community-build/test
+  community_build:
+    runs-on: self-hosted
+    container: akmetiuk/dotty:2020-02-12
+
+    steps:
+      - name: Git Checkout
+        uses: actions/checkout@v2
+
+      - name: Cache Ivy
+        uses: actions/cache@v1.1.2
+        with:
+          path: /root/.ivy2/cache
+          key: ${{ runner.os }}-ivy-${{ hashFiles('**/build.sbt') }}
+          restore-keys: ${{ runner.os }}-ivy-
+
+      - name: Cache SBT
+        uses: actions/cache@v1.1.2
+        with:
+          path: /root/.sbt
+          key: ${{ runner.os }}-sbt-${{ hashFiles('project/**') }}
+          restore-keys: ${{ runner.os }}-sbt-
+
+      - name: Cache Coursier and Mill
+        uses: actions/cache@v1.1.2
+        with:
+          path: /root/.cache
+          key: ${{ runner.os }}-general-${{ hashFiles('**/build.sbt') }}
+          restore-keys: ${{ runner.os }}-general-
+
+      - name: Test
+        run: |
+          git submodule sync
+          git submodule update --init --recursive --jobs 7
+          ./project/scripts/sbt community-build/test
 
   test_sbt:
-    runs-on: ubuntu-latest
+    runs-on: self-hosted
     container: akmetiuk/dotty:2020-02-12
     if: github.event_name == 'push' &&
         startsWith(github.event.ref, 'refs/tags/')
@@ -141,7 +141,7 @@ jobs:
         run: ./project/scripts/sbt sbt-dotty/scripted
 
   test_java11:
-    runs-on: ubuntu-latest
+    runs-on: self-hosted
     container: akmetiuk/dotty:2020-02-12
     if: github.event_name == 'push' &&
         startsWith(github.event.ref, 'refs/tags/')
diff --git a/community-build/community-projects/os-lib b/community-build/community-projects/os-lib
index 9cb5d0eb4bf2..b94acd284c00 160000
--- a/community-build/community-projects/os-lib
+++ b/community-build/community-projects/os-lib
@@ -1 +1 @@
-Subproject commit 9cb5d0eb4bf20a5b4ef86a7bf55cc896719f887e
+Subproject commit b94acd284c00c4f75c21e44543da7a3543113fdf