openipmi: fix cross compilation

(cherry picked from commit 6f8fa26d6f6ebdcf51964ddcbf33e160f8d8436d)

pkgs/by-name/op/openipmi/package.nix

@@ -1,5 +1,6 @@
 {
   stdenv,
+  buildPackages,
   fetchurl,
   popt,
   ncurses,
@@ -18,6 +19,17 @@ stdenv.mkDerivation rec {
     sha256 = "sha256-xi049dp99Cmaw6ZSUI6VlTd1JEAYHjTHayrs69fzAbk=";
   };
 
+  postConfigure = lib.optionalString (!stdenv.buildPlatform.canExecute stdenv.hostPlatform) ''
+    substituteInPlace lanserv/Makefile \
+      --replace-fail "sdrcomp/sdrcomp_build -o" "${buildPackages.openipmi}/bin/sdrcomp -o"
+  '';
+
+  strictDeps = true;
+
+  nativeBuildInputs = [
+    python3
+  ];
+
   buildInputs = [
     ncurses
     popt
@@ -26,6 +38,10 @@ stdenv.mkDerivation rec {
     openssl
   ];
 
+  makeFlags = [
+    "BUILD_CC=${stdenv.cc.targetPrefix}cc"
+  ];
+
   outputs = [
     "out"
     "lib"