fix(hooks): trying to fix bug in GH Actions

```
:dialyzer.run error: File not found: /nix/store/v4616fdvcf89xwm0rkw1fgxn040yda8v-erlang-26.2.5.1/lib/erlang/lib/dialyzer-5.1.3/ebin/erl_bif_types.beam
```

.github/workflows/elixir.yml

@@ -42,13 +42,15 @@ jobs:
         id: deps-cache
         uses: actions/cache@v4
         with:
+          # would be good to cache priv/plts but something isn't being cached right,
+          # and plt ends up expecting files managed by Nix which aren't there.
+          # example: :dialyzer.run error: File not found: /nix/store/*-erlang-26.2.5.1/lib/erlang/lib/dialyzer-5.1.3/ebin/erl_bif_types.beam
           path: |
             deps
             _build
-            priv/plts
             .nix-mix
             .nix-hex
-          key: ${{ runner.os }}-mix-${{ hashFiles(format('{0}{1}', github.workspace, '/flake.*')) }}-${{ hashFiles(format('{0}{1}', github.workspace, '/mix.*')) }}
+          key: ${{ runner.os }}-mix-${{ hashFiles(format('{0}{1}', github.workspace, '/flake.*')) }}-${{ hashFiles(format('{0}{1}', github.workspace, '**/mix.*')) }}
           restore-keys: |
             ${{ runner.os }}-mix-${{ hashFiles(format('{0}{1}', github.workspace, '/flake.*')) }}
             ${{ runner.os }}-mix-

flake.nix

@@ -93,6 +93,8 @@
             dialyzer = {
               enable = true;
               package = ex;
+              pass_filenames = false;
+              require_serial = true;
             };
             custom-mix-test = {
               enable = true;