diff --git a/src/main/g8/shell.nix b/src/main/g8/shell.nix
index fa2a56c..f04c9ae 100644
--- a/src/main/g8/shell.nix
+++ b/src/main/g8/shell.nix
@@ -1,6 +1,6 @@
 (import (let lock = builtins.fromJSON (builtins.readFile ./flake.lock);
 in fetchTarball {
   url =
-    "https://github.com/edolstra/flake-compat/archive/${lock.nodes.flake-compat.locked.rev}.tar.gz";
+    "https://github.com/edolstra/flake-compat/archive/\${lock.nodes.flake-compat.locked.rev}.tar.gz";
   sha256 = lock.nodes.flake-compat.locked.narHash;
 }) { src = ./.; }).shellNix