From ff41002b802a8d8dd77b60ca83e4f614feceeaf3 Mon Sep 17 00:00:00 2001
From: worldofpeace <worldofpeace@protonmail.ch>
Date: Tue, 25 Feb 2020 23:25:43 -0500
Subject: [PATCH] exiv2: fix exiv2.pc file

This fix comes from #71669.
---
 pkgs/development/libraries/exiv2/default.nix | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/pkgs/development/libraries/exiv2/default.nix b/pkgs/development/libraries/exiv2/default.nix
index 425346df816e..dc7610ee1782 100644
--- a/pkgs/development/libraries/exiv2/default.nix
+++ b/pkgs/development/libraries/exiv2/default.nix
@@ -26,6 +26,11 @@ stdenv.mkDerivation rec {
   cmakeFlags = [
     "-DEXIV2_BUILD_PO=ON"
     "-DEXIV2_BUILD_DOC=ON"
+    # the cmake package does not handle absolute CMAKE_INSTALL_INCLUDEDIR correctly
+    # (setting it to an absolute path causes include files to go to $out/$out/include,
+    #  because the absolute path is interpreted with root at $out).
+    "-DCMAKE_INSTALL_INCLUDEDIR=include"
+    "-DCMAKE_INSTALL_LIBDIR=lib"
   ];
 
   outputs = [ "out" "dev" "doc" "man" ];