diff --git a/lib/install-nix.sh b/lib/install-nix.sh
index 1b64970..89d372a 100755
--- a/lib/install-nix.sh
+++ b/lib/install-nix.sh
@@ -45,7 +45,7 @@ else
   add_config "build-users-group ="
   sudo mkdir -p /etc/nix
   sudo chmod 0755 /etc/nix
-  cp $workdir/nix.conf /etc/nix/nix.conf
+  sudo cp $workdir/nix.conf /etc/nix/nix.conf
 fi
 
 if [[ $INPUT_INSTALL_OPTIONS != "" ]]; then