diff --git a/modules/nixos/forgejo-multiuser-nix-runners/default.nix b/modules/nixos/forgejo-multiuser-nix-runners/default.nix
index 6a71006..47e3c34 100644
--- a/modules/nixos/forgejo-multiuser-nix-runners/default.nix
+++ b/modules/nixos/forgejo-multiuser-nix-runners/default.nix
@@ -570,7 +570,7 @@ in
               [
                 "-e PAGER=cat"
                 "-e PATH=${runnerPath}"
-                "-e NIX_PATH=nixpkgs=${pkgs.path}"
+                "-e NIX_PATH=nixpkgs=${builtins.storePath pkgs.path}"
                 "-e SSL_CERT_FILE=/etc/ssl/certs/ca-bundle.crt"
                 "-v ${cfg.storePath}/nix:/nix:ro"
                 "-v ${pkgs.cacert}/etc/ssl:/etc/ssl:ro"