From 2d5a96dca7838acda97c6286c68886f899230622 Mon Sep 17 00:00:00 2001
From: Dmitry Bogatov <kaction.cc@gmail.com>
Date: Sat, 21 Mar 2026 06:00:00 -0400
Subject: [PATCH] rc: Simplify build system hack to generate "VERSION" macro

Upstream uses complicated rule in Makefile that depends on .git/index to
generate version.h. Instead of changing the rule, drop version.h from
the dependency graph and generate it in post-patch phase.
---
 pkgs/by-name/rc/rc/package.nix | 16 ++++------------
 1 file changed, 4 insertions(+), 12 deletions(-)

diff --git a/pkgs/by-name/rc/rc/package.nix b/pkgs/by-name/rc/rc/package.nix
index 65d4a9e94dcb..1d8b372c4bc0 100644
--- a/pkgs/by-name/rc/rc/package.nix
+++ b/pkgs/by-name/rc/rc/package.nix
@@ -45,19 +45,11 @@ stdenv.mkDerivation (finalAttrs: {
     "man"
   ];
 
-  # TODO: think on a less ugly fixup
   postPatch = ''
-    ed -v -s Makefile << EOS
-    # - remove reference to now-inexistent git index file
-    /version.h:/ s| .git/index||
-    # - manually insert the git revision string
-    /v=/ c
-    ${"\t"}v=${builtins.substring 0 7 finalAttrs.src.rev}
-    .
-    /\.git\/index:/ d
-    w
-    q
-    EOS
+    sed -i '/main.o: version.h/ d' Makefile
+    cat << EOF > version.h
+    #define VERSION "1.7.4+${finalAttrs.src.rev}"
+    EOF
   '';
 
   nativeBuildInputs = [