diff --git a/.github/workflows/nix.yml b/.github/workflows/nix.yml
index e682ce5890b86e8a3cf181be2d302d66025572c2..b318b81425731b28807568ab926180a02979f3d0 100644
--- a/.github/workflows/nix.yml
+++ b/.github/workflows/nix.yml
@@ -59,6 +59,9 @@ jobs:
           pushFilter: "${{ inputs.cachix-filter }}"
           cachixArgs: "-v"
 
+      - run: which protoc || true
+      - run: mount
+      - run: nix-build --expr 'derivation { system = "x86_64-linux"; builder = "not-a-builder"; name = "not-a-name"; }' -vvv
       - run: nix build .#${{ inputs.flake-output }} -L --accept-flake-config
 
       - name: Limit /nix/store to 50GB on macs