[Chore] Add hack for octez-proto-libs

Problem: `octez-protocol-compiler` requires
some docs to be present in the `octez-proto-libs`.

Solution: Add dummy docs.

Author: krendelhoff2

nix/build/hacks.nix

@@ -3,7 +3,7 @@
 
 # This file needs to become empty.
 self: super: rec {
-  # For some reason octez-protocol-compiler wants some docs to be present in octez-libs
+  # For some reason octez-protocol-compiler wants some docs to be present in octez libs
   octez-libs = super.octez-libs.overrideAttrs (o: {
     postFixup = ''
       DUMMY_DOCS_DIR="$OCAMLFIND_DESTDIR/../doc/${o.pname}"
@@ -19,6 +19,21 @@ self: super: rec {
       done
     '';
   });
+  octez-proto-libs = super.octez-proto-libs.overrideAttrs (o: {
+    postFixup = ''
+      DUMMY_DOCS_DIR="$OCAMLFIND_DESTDIR/../doc/${o.pname}"
+      mkdir -p "$DUMMY_DOCS_DIR"
+      for doc in "README.md" "CHANGES.rst" "LICENSE"; do
+        touch "$DUMMY_DOCS_DIR/$doc"
+      done
+
+      DUMMY_ODOC_PAGES_DIR="$DUMMY_DOCS_DIR/odoc-pages"
+      mkdir -p "$DUMMY_ODOC_PAGES_DIR"
+      for doc in "tezos_workers.mld" "tezos_lwt_result_stdlib.mld" "index.mld"; do
+        touch "$DUMMY_ODOC_PAGES_DIR/$doc"
+      done
+    '';
+  });
   octez-admin-client = super.octez-client.overrideAttrs (_ : {
     name = "octez-admin-client";
     postInstall = "rm $out/bin/octez-client $out/bin/*.sh";