diff --git a/shell.nix b/shell.nix
index 9e967032..1ad58f49 100644
--- a/shell.nix
+++ b/shell.nix
@@ -1,6 +1,6 @@
 # The `default.nix` in flake-compat reads `flake.nix` and `flake.lock` from `src` and
 # returns an attribute set of the shape `{ defaultNix, shellNix }`
 
-(import (fetchTarball https://github.com/edolstra/flake-compat/archive/master.tar.gz) {
+(import (fetchTarball "https://github.com/edolstra/flake-compat/archive/master.tar.gz") {
   src = ./.;
 }).shellNix