From 9a59b1b0fed320fef681f0f3a19590b39c8d840c Mon Sep 17 00:00:00 2001
From: Markus Kowalewski <markus.kowalewski@gmail.com>
Date: Sun, 31 Jul 2022 12:48:06 +0200
Subject: [PATCH] libosmocore: fix version in pkg-config file

All osmocon packets look for a file ".tarball-version",
when generating pkg-config files, which is absent in the git sources.
This results in an UNKNOWN version in the pkg-config, which confuses
configure of other osmocom packages, when checking the version.
---
 pkgs/applications/misc/libosmocore/default.nix | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/pkgs/applications/misc/libosmocore/default.nix b/pkgs/applications/misc/libosmocore/default.nix
index 0cab21519cf2..a3de388a52ab 100644
--- a/pkgs/applications/misc/libosmocore/default.nix
+++ b/pkgs/applications/misc/libosmocore/default.nix
@@ -22,6 +22,10 @@ stdenv.mkDerivation rec {
     hash = "sha256-Dkud3ZA9m/UVbPugbQztUJXFpkQYTWjK2mamxfto9JA=";
   };
 
+  postPatch = ''
+    echo "${version}" > .tarball-version
+  '';
+
   propagatedBuildInputs = [
     talloc
   ];