diff --git a/packages/bookwyrm/package.nix b/packages/bookwyrm/package.nix
index e628199..efe8d9c 100644
--- a/packages/bookwyrm/package.nix
+++ b/packages/bookwyrm/package.nix
@@ -144,7 +144,7 @@ mkDerivation {
 		cat <<- EOF > $out/bin/bookwyrm-env
 			#!${bash}/bin/sh
 
-			if [ $( id -un ) != "bookwyrm" || $( id -gn ) != "bookwyrm" ] ; then
+			if [ $( id -un ) != "bookwyrm" -o $( id -gn ) != "bookwyrm" ] ; then
 				echo "You are not running as the 'bookwyrm' user and group, quitting"
 				exit 1
 			fi