diff --git a/pkgs/by-name/li/liborcus/package.nix b/pkgs/by-name/li/liborcus/package.nix
index 4e3a48d10b8b..2a4a0910caa9 100644
--- a/pkgs/by-name/li/liborcus/package.nix
+++ b/pkgs/by-name/li/liborcus/package.nix
@@ -25,6 +25,7 @@ stdenv.mkDerivation rec {
   nativeBuildInputs = [
     autoreconfHook
     pkg-config
+    python3.pythonOnBuildForHost
   ];
 
   buildInputs = [
@@ -35,6 +36,8 @@ stdenv.mkDerivation rec {
     zlib
   ];
 
+  strictDeps = true;
+
   meta = with lib; {
     description = "Collection of parsers and import filters for spreadsheet documents";
     homepage = "https://gitlab.com/orcus/orcus";