Does updating nix help?

Author: LeifAndersen

shell.nix

@@ -1,4 +1,5 @@
-{ pkgs ? import (fetchTarball "github.com/NixOS/nixpkgs/archive/7e9b0dff974c89e070da1ad85713ff3c20b0ca97.tar.gz") {}}:
+{ pkgs ? import <nixpkgs> {} }:
+# { pkgs ? import (fetchTarball "github.com/NixOS/nixpkgs/archive/7e9b0dff974c89e070da1ad85713ff3c20b0ca97.tar.gz") {}}:
 # Pinned to the latest (as of this writing) release of NixOS 21.05
 
 pkgs.mkShell {