diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index f7c3ff94..bd584546 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -20,6 +20,7 @@ jobs:
       with:
         nix_path: nixpkgs=channel:nixos-20.03
     - run: nix-env -iA cachix -f https://cachix.org/api/v1/install
+    - run: test $NIX_PATH == "nixpkgs=channel:nixos-20.03"
     - run: cat /etc/nix/nix.conf
     # cachix should be available and be able to configure a cache
     - run: cachix use cachix
diff --git a/lib/install-nix.sh b/lib/install-nix.sh
index 904f487a..8301444a 100755
--- a/lib/install-nix.sh
+++ b/lib/install-nix.sh
@@ -43,6 +43,8 @@ else
   # "fix" the following error when running nix*
   # error: the group 'nixbld' specified in 'build-users-group' does not exist
   add_config "build-users-group ="
+  mkdir -m 0755 /etc/nix
+  cp $workdir/nix.conf /etc/nix/nix.conf
 fi
 
 if [[ $INPUT_INSTALL_OPTIONS != "" ]]; then