diff --git a/pkgs/servers/http/nix-binary-cache/nix-binary-cache.cgi.in b/pkgs/servers/http/nix-binary-cache/nix-binary-cache.cgi.in
index ce18fa7727f4..1afe8854fed1 100644
--- a/pkgs/servers/http/nix-binary-cache/nix-binary-cache.cgi.in
+++ b/pkgs/servers/http/nix-binary-cache/nix-binary-cache.cgi.in
@@ -51,7 +51,7 @@ case "$QUERY_STRING" in
 	*.narinfo)
 		hash=${QUERY_STRING%.narinfo}
 		hash=${hash#/}
-		path="$(echo "$STORE_DIR/$hash-"* | sort | head -n 1)"
+		path="$(echo "$STORE_DIR/$hash-"* | @coreutils@/sort | @coreutils@/head -n 1)"
 		if [ -n "$path" ] && [ -e "$path" ]; then
 			header
 			info="$(