From 9a4da9a6c940047e86735870c52f9c6b858831e1 Mon Sep 17 00:00:00 2001
From: Markus Kowalewski <markus.kowalewski@gmail.com>
Date: Mon, 30 Mar 2026 15:37:31 +0200
Subject: [PATCH] openmpi: ensure that fortran .mod files are in dev output

---
 pkgs/by-name/op/openmpi/package.nix | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/pkgs/by-name/op/openmpi/package.nix b/pkgs/by-name/op/openmpi/package.nix
index 20fc9b74502f..67a0d62ef13b 100644
--- a/pkgs/by-name/op/openmpi/package.nix
+++ b/pkgs/by-name/op/openmpi/package.nix
@@ -199,6 +199,10 @@ stdenv.mkDerivation (finalAttrs: {
     ''
       find $out/lib/ -name "*.la" -exec rm -f \{} \;
 
+      # Fortran .mod files end up in bin output.
+      # Force all headers into the dev output .
+      moveToOutput "include/" "''${!outputDev}"
+
       # The main wrapper that all the rest of the commonly used binaries are
       # symlinked to
       moveToOutput "bin/opal_wrapper" "''${!outputDev}"