diff --git a/contrib/reproducible/guix/guix-build.sh b/contrib/reproducible/guix/guix-build.sh
index 128cbcc6..ed62283a 100755
--- a/contrib/reproducible/guix/guix-build.sh
+++ b/contrib/reproducible/guix/guix-build.sh
@@ -63,7 +63,7 @@ for project_folder in "" "gui"; do
     PROJECT_PATCHES_ROOT="$PWD/contrib/reproducible/guix/patches/$project_folder"
 
     project_needs_patches() {
-        test $(ls -A1q "$PROJECT_PATCHES_ROOT" |grep patch)
+        test "$(ls -A1q "$PROJECT_PATCHES_ROOT" |grep patch)"
     }
 
     maybe_create_dir "$PROJECT_OUT_DIR"