diff --git a/users/simon/base.nix b/users/simon/base.nix
index 864f09a..de3da75 100644
--- a/users/simon/base.nix
+++ b/users/simon/base.nix
@@ -4,7 +4,7 @@ let
 in
 {
   imports = [
-    (import "${builtins.fetchTarball "https://github.com/nix-community/home-manager/archive/master.tar.gz"}/nixos") # FIXME: pin to 20.09
+    (import "${builtins.fetchTarball "https://github.com/nix-community/home-manager/archive/release-20.09.tar.gz"}/nixos")
   ];
 
   users.users.simon = {