diff --git a/.github/workflows/abi-checker.yml b/.github/workflows/abi-checker.yml
index 96c274a5c..3eb5343fd 100644
--- a/.github/workflows/abi-checker.yml
+++ b/.github/workflows/abi-checker.yml
@@ -30,6 +30,7 @@ jobs:
 
       - name: "Prepare environment"
         run: |
+          sudo sed -i '/deb-src/s/^# //' /etc/apt/sources.list
           sudo apt-get update -q -y
           sudo apt-get install -q -y \
             devscripts \
diff --git a/.github/workflows/alt-architectures.yml b/.github/workflows/alt-architectures.yml
index 1a7fc74b4..0d7f64f4f 100644
--- a/.github/workflows/alt-architectures.yml
+++ b/.github/workflows/alt-architectures.yml
@@ -38,6 +38,7 @@ jobs:
             CTEST_OUTPUT_ON_FAILURE: 1
             WLOG_LEVEL: 'trace'
           install: |
+            sed -i '/deb-src/s/^# //' /etc/apt/sources.list
             apt-get update -q -y
             apt-get install -q -y \
               devscripts \
diff --git a/.github/workflows/codeql-analysis.yml b/.github/workflows/codeql-analysis.yml
index 4e5bb7b98..f79691b08 100644
--- a/.github/workflows/codeql-analysis.yml
+++ b/.github/workflows/codeql-analysis.yml
@@ -78,6 +78,7 @@ jobs:
     # 📚 See https://docs.github.com/en/actions/using-workflows/workflow-syntax-for-github-actions#jobsjob_idstepsrun
     - if: matrix.build-mode == 'manual'
       run: |
+        sudo sed -i '/deb-src/s/^# //' /etc/apt/sources.list
         sudo apt update
         sudo apt-get install -q -y \
               devscripts \
diff --git a/.github/workflows/coverity.yml b/.github/workflows/coverity.yml
index 60950f716..3d165bdb2 100644
--- a/.github/workflows/coverity.yml
+++ b/.github/workflows/coverity.yml
@@ -17,6 +17,7 @@ jobs:
     - uses: actions/checkout@v4
     - name: Install apt dependencies
       run: |
+        sudo sed -i '/deb-src/s/^# //' /etc/apt/sources.list
         sudo apt-get update
         sudo apt-get install -q -y \
               devscripts \
diff --git a/.github/workflows/mingw.yml b/.github/workflows/mingw.yml
index d7920c944..be0852253 100644
--- a/.github/workflows/mingw.yml
+++ b/.github/workflows/mingw.yml
@@ -15,6 +15,7 @@ jobs:
 
       - name: "Prepare environment"
         run: |
+          sed -i '/deb-src/s/^# //' /etc/apt/sources.list
           sudo apt-get update -q -y
           sudo apt-get install -q -y \
             git \