diff --git a/.github/workflows/nightly.yaml b/.github/workflows/nightly.yaml
index a9a8d24..b6ff34b 100644
--- a/.github/workflows/nightly.yaml
+++ b/.github/workflows/nightly.yaml
@@ -60,7 +60,7 @@ jobs:
 
 
   linuxbuild:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-20.04
     steps:
       - uses: actions/checkout@v3
       - uses: flucoma/actions/env@main
@@ -77,7 +77,7 @@ jobs:
           path: install/FluCoMa-SC-Linux-nightly.tar.gz
   
   release:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-20.04
     needs: [macbuild, winbuild, linuxbuild]
     steps: