diff --git a/lib/install-nix.sh b/lib/install-nix.sh
index 97878811..4d9b8e93 100755
--- a/lib/install-nix.sh
+++ b/lib/install-nix.sh
@@ -36,7 +36,7 @@ else
   # "fix" the following error when running nix*
   # error: the group 'nixbld' specified in 'build-users-group' does not exist
   mkdir -m 0755 /etc/nix
-  echo "build-users-group =" > /etc/nix/nix.conf
+  echo "build-users-group =" >> /etc/nix/nix.conf
 fi
 
 if [[ $INPUT_INSTALL_OPTIONS != "" ]]; then