From 23b3d4fb8ef995d956989e3ec13dfb5def1a88ea Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Vladim=C3=ADr=20=C4=8Cun=C3=A1t?= <v@cunat.cz>
Date: Wed, 28 Sep 2022 17:48:17 +0200
Subject: [PATCH] folly: fix paths in .pc file

---
 pkgs/development/libraries/folly/default.nix | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/pkgs/development/libraries/folly/default.nix b/pkgs/development/libraries/folly/default.nix
index 0f866eeb9ec9..116d3c9ce40d 100644
--- a/pkgs/development/libraries/folly/default.nix
+++ b/pkgs/development/libraries/folly/default.nix
@@ -59,6 +59,12 @@ stdenv.mkDerivation rec {
   NIX_CFLAGS_COMPILE = [ "-DFOLLY_MOBILE=${if follyMobile then "1" else "0"}" "-fpermissive" ];
   cmakeFlags = [ "-DBUILD_SHARED_LIBS=ON" ];
 
+  postFixup = ''
+    substituteInPlace "$out"/lib/pkgconfig/libfolly.pc \
+      --replace '=''${prefix}//' '=/' \
+      --replace '=''${exec_prefix}//' '=/'
+  '';
+
   # folly-config.cmake, will `find_package` these, thus there should be
   # a way to ensure abi compatibility.
   passthru = {