diff --git a/.github/workflows/build-nightly.yaml b/.github/workflows/build-nightly.yaml
index 50806b9626e..ea3a8262a48 100644
--- a/.github/workflows/build-nightly.yaml
+++ b/.github/workflows/build-nightly.yaml
@@ -14,7 +14,7 @@ jobs:
       matrix:
         configuration: [FastDebug, Release]
     name: Linux
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-20.04
     container: ghcr.io/scp-fs2open/linux_build:sha-3d30dc5
     steps:
       # - name: Cache Qt
diff --git a/.github/workflows/build-release.yaml b/.github/workflows/build-release.yaml
index 382176b81a9..35cb911e572 100644
--- a/.github/workflows/build-release.yaml
+++ b/.github/workflows/build-release.yaml
@@ -43,7 +43,7 @@ jobs:
         configuration: [FastDebug, Release]
     name: Linux
     needs: create_release   # Don't run this job until create_release is done and successful
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-20.04
     container: ghcr.io/scp-fs2open/linux_build:sha-3d30dc5
     steps:
       # - name: Cache Qt
diff --git a/.github/workflows/build-test.yaml b/.github/workflows/build-test.yaml
index eb0fd07db42..b2d0d089044 100644
--- a/.github/workflows/build-test.yaml
+++ b/.github/workflows/build-test.yaml
@@ -14,7 +14,7 @@ jobs:
       matrix:
         configuration: [FastDebug, Release]
     name: Linux
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-20.04
     container: ghcr.io/scp-fs2open/linux_build:sha-3d30dc5
     steps:
       # - name: Cache Qt
diff --git a/.github/workflows/cache-master.yaml b/.github/workflows/cache-master.yaml
index 7f71fe95b54..f11e0fdcdd2 100644
--- a/.github/workflows/cache-master.yaml
+++ b/.github/workflows/cache-master.yaml
@@ -24,7 +24,7 @@ jobs:
             compiler: gcc-10
             cmake_options: -DFSO_BUILD_WITH_OPENGL=OFF -DFSO_BUILD_WITH_VULKAN=OFF
     name: Linux
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-20.04
     container: ghcr.io/scp-fs2open/linux_build:sha-3d30dc5
     steps:
       # - name: Cache Qt
diff --git a/.github/workflows/test-pull_request.yaml b/.github/workflows/test-pull_request.yaml
index dae3381c5e0..4705234b2ed 100644
--- a/.github/workflows/test-pull_request.yaml
+++ b/.github/workflows/test-pull_request.yaml
@@ -21,7 +21,7 @@ jobs:
             compiler: gcc-10
             cmake_options: -DFSO_BUILD_WITH_OPENGL=OFF -DFSO_BUILD_WITH_VULKAN=OFF
     name: Linux
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-20.04
     container: ghcr.io/scp-fs2open/linux_build:sha-3d30dc5
     steps:
       # - name: Cache Qt