diff --git a/default.nix b/default.nix
index 5922761d..5e919f79 100644
--- a/default.nix
+++ b/default.nix
@@ -1,4 +1,4 @@
-(import (builtins.fetchTarball https://github.com/edolstra/flake-compat/archive/master.tar.gz) {
+(import (builtins.fetchTarball "https://github.com/edolstra/flake-compat/archive/master.tar.gz") {
   src = ./.;
 })
 .defaultNix