diff --git a/.github/workflows/build_linux.yml b/.github/workflows/build_linux.yml
index 3d99537ba..6cc6efcb3 100644
--- a/.github/workflows/build_linux.yml
+++ b/.github/workflows/build_linux.yml
@@ -10,6 +10,9 @@ jobs:
     steps:
     - name: Install dependencies
       run: |
+        sudo rm -f /etc/apt/sources.list.d/*
+        sudo cp -f .github/workflows/build_linux_sources.list /etc/apt/sources.list
+        sudo apt-get update
         sudo apt-get install libx11-dev libxcursor-dev libxinerama-dev build-essential gettext libtool libtool-bin libpulse-dev libasound2-dev libjack-dev portaudio19-dev
     - name: Checkout repo
       uses: actions/checkout@v2
diff --git a/.github/workflows/build_linux_sources.list b/.github/workflows/build_linux_sources.list
new file mode 100644
index 000000000..4d8f94f35
--- /dev/null
+++ b/.github/workflows/build_linux_sources.list
@@ -0,0 +1,4 @@
+deb http://archive.ubuntu.com/ubuntu/ focal main restricted universe multiverse
+deb http://archive.ubuntu.com/ubuntu/ focal-updates main restricted universe multiverse
+deb http://archive.ubuntu.com/ubuntu/ focal-security main restricted universe multiverse
+deb http://archive.ubuntu.com/ubuntu/ focal-backports main restricted universe multiverse