From 4b6bdc29b0b7f1c3cc2b4952c2774a8baccd45a8 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?J=C3=B6rg=20Thalheim?= <joerg@thalheim.io>
Date: Tue, 20 Nov 2018 21:44:23 +0000
Subject: [PATCH 1/3] libpfm: fix cross compilation

---
 pkgs/development/libraries/libpfm/default.nix | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/pkgs/development/libraries/libpfm/default.nix b/pkgs/development/libraries/libpfm/default.nix
index ffd195b6462..36e99c8cd91 100644
--- a/pkgs/development/libraries/libpfm/default.nix
+++ b/pkgs/development/libraries/libpfm/default.nix
@@ -11,6 +11,11 @@ stdenv.mkDerivation rec {
 
   installFlags = "DESTDIR=\${out} PREFIX= LDCONFIG=true";
 
+  makeFlags = [
+    "ARCH=${stdenv.targetPlatform.uname.processor}"
+    "SYS=${stdenv.targetPlatform.uname.system}"
+  ];
+
   NIX_CFLAGS_COMPILE = [ "-Wno-error" ];
 
   meta = with stdenv.lib; {

From f17ff7d6efa1727bb6fa1c33d9f7af3229d94083 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?J=C3=B6rg=20Thalheim?= <joerg@thalheim.io>
Date: Mon, 26 Nov 2018 07:11:23 +0000
Subject: [PATCH 2/3] freetype: fix cross-build

---
 pkgs/development/libraries/freetype/default.nix | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/pkgs/development/libraries/freetype/default.nix b/pkgs/development/libraries/freetype/default.nix
index 5a11d03c591..59ffd47c310 100644
--- a/pkgs/development/libraries/freetype/default.nix
+++ b/pkgs/development/libraries/freetype/default.nix
@@ -62,6 +62,9 @@ in stdenv.mkDerivation rec {
   doCheck = true;
 
   postInstall = glib.flattenInclude + ''
+    substituteInPlace $dev/bin/freetype-config \
+      --replace ${buildPackages.pkgconfig} ${pkgconfig}
+
     wrapProgram "$dev/bin/freetype-config" \
       --set PKG_CONFIG_PATH "$PKG_CONFIG_PATH:$dev/lib/pkgconfig"
   '';

From fbb114107d7fae6c0488cc7cc30d4786fc1dd9c6 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?J=C3=B6rg=20Thalheim?= <joerg@thalheim.io>
Date: Mon, 26 Nov 2018 07:12:45 +0000
Subject: [PATCH 3/3] wayland: fix cross-build

---
 pkgs/development/libraries/wayland/default.nix | 15 ++++++++++++---
 1 file changed, 12 insertions(+), 3 deletions(-)

diff --git a/pkgs/development/libraries/wayland/default.nix b/pkgs/development/libraries/wayland/default.nix
index 866b1232aef..c694cc7b445 100644
--- a/pkgs/development/libraries/wayland/default.nix
+++ b/pkgs/development/libraries/wayland/default.nix
@@ -1,5 +1,5 @@
 { lib, stdenv, fetchurl, pkgconfig
-, libffi, libxml2
+, libffi, libxml2, wayland
 , expat ? null # Build wayland-scanner (currently cannot be disabled as of 1.7.0)
 }:
 
@@ -15,9 +15,18 @@ stdenv.mkDerivation rec {
     sha256 = "1xajhxad43izq9f7sbww1hlg42nayijy8xnp21kgpk09c6sw4wjf";
   };
 
-  configureFlags = [ "--with-scanner" "--disable-documentation" ];
+  configureFlags = [
+    "--disable-documentation"
+  ] ++ lib.optionals (stdenv.buildPlatform != stdenv.hostPlatform) [
+    "--with-host-scanner"
+  ];
 
-  nativeBuildInputs = [ pkgconfig ];
+  nativeBuildInputs = [
+    pkgconfig
+  ] ++ lib.optionals (stdenv.buildPlatform != stdenv.hostPlatform) [
+    # for wayland-scanner during build
+    wayland
+  ];
 
   buildInputs = [ libffi /* docbook_xsl doxygen graphviz libxslt xmlto */ expat libxml2 ];