diff --git a/.github/workflows/nix.yml b/.github/workflows/nix.yml
index 32b16206b2..eab3bae4e5 100644
--- a/.github/workflows/nix.yml
+++ b/.github/workflows/nix.yml
@@ -34,7 +34,25 @@ jobs:
           key: ${{ steps.cache-llvm-source.outputs.cache-primary-key }}
           path: |
             llvm-project/compiler-rt
-      - uses: cachix/install-nix-action@v22
+      - name: find and print Targets.def
+        run: |
+          find /usr/include/ -name Targets.def -exec sh -c 'echo {}; cat {}' \;
+      - name: list packages
+        run: |
+          apt list --installed
+      - uses: cachix/install-nix-action@v30
+        with:
+          install_url: https://releases.nixos.org/nix/nix-2.24.7/install
+      - name: Nix version
+        run: |
+          nix --version
+      - name: Build
+        run: |
+          nix develop --ignore-environment --keep HOME --command bash -c "go install"
+      - uses: actions/upload-artifact@v4
+        with:
+          name: upload
+          path: "/home/runner/go/bin/tinygo"
       - name: Test
         run: |
-          nix develop --ignore-environment --keep HOME --command bash -c "go install && ~/go/bin/tinygo version && ~/go/bin/tinygo build -o test ./testdata/cgo"
+          nix develop --ignore-environment --keep HOME --command bash -c "~/go/bin/tinygo version && ~/go/bin/tinygo build -o test ./testdata/cgo"