diff --git a/.github/workflows/check.yml b/.github/workflows/check.yml
index 8feaa5bf..0bd41bd9 100644
--- a/.github/workflows/check.yml
+++ b/.github/workflows/check.yml
@@ -8,6 +8,7 @@ on:
   schedule:
     - cron: '30 11 * * *' # At 11:30 everyday.
 env:
+  NIXPKGS_ALLOW_BROKEN: "1"
   NIXPKGS_ALLOW_UNFREE: "1"
 jobs:
   check-outputs:
diff --git a/.github/workflows/iso.yml b/.github/workflows/iso.yml
index 02d415b0..4d730abf 100644
--- a/.github/workflows/iso.yml
+++ b/.github/workflows/iso.yml
@@ -15,8 +15,11 @@ jobs:
       - uses: DeterminateSystems/nix-installer-action@v4
       - name: Build ISO
         run: |
-          nix build .#images.bootstrap --out-link build-iso-result
-          nix build .#images.graphical-installer --out-link build-graphical-iso-result
+          nix build .#images.bootstrap --impure --out-link build-iso-result
+          nix build .#images.graphical-installer --impure --out-link build-graphical-iso-result
+        env:
+          NIXPKGS_ALLOW_BROKEN: "1"
+          NIXPKGS_ALLOW_UNFREE: "1"
       - name: Create release
         if: github.ref == 'refs/heads/master'
         env: