From 73350f7cb762fcadc3e9da169a579a19831d1bf6 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Jos=C3=A9=20Romildo=20Malaquias?= <malaquias@gmail.com>
Date: Sat, 27 Feb 2021 18:24:44 -0300
Subject: [PATCH] lightdm_gtk_greeter: exo-csource was replaced by xdt-source

---
 .../display-managers/lightdm/gtk-greeter.nix        | 13 ++++++++++---
 pkgs/top-level/all-packages.nix                     |  2 +-
 2 files changed, 11 insertions(+), 4 deletions(-)

diff --git a/pkgs/applications/display-managers/lightdm/gtk-greeter.nix b/pkgs/applications/display-managers/lightdm/gtk-greeter.nix
index 90f7a03d0dd2..cf1e5957755e 100644
--- a/pkgs/applications/display-managers/lightdm/gtk-greeter.nix
+++ b/pkgs/applications/display-managers/lightdm/gtk-greeter.nix
@@ -9,7 +9,7 @@
 , useGTK2 ? false
 , gtk2
 , gtk3 # gtk3 seems better supported
-, exo
+, xfce4-dev-tools
 , at-spi2-core
 , librsvg
 , hicolor-icon-theme
@@ -31,8 +31,8 @@ stdenv.mkDerivation rec {
     sha256 = "1g7wc3d3vqfa7mrdhx1w9ywydgjbffla6rbrxq9k3sc62br97qms";
   };
 
-  nativeBuildInputs = [ pkg-config intltool wrapGAppsHook ];
-  buildInputs = [ lightdm exo librsvg hicolor-icon-theme ]
+  nativeBuildInputs = [ pkg-config intltool xfce4-dev-tools wrapGAppsHook ];
+  buildInputs = [ lightdm librsvg hicolor-icon-theme ]
     ++ (if useGTK2 then [ gtk2 ] else [ gtk3 ]);
 
   configureFlags = [
@@ -42,6 +42,13 @@ stdenv.mkDerivation rec {
     "--sbindir=${placeholder "out"}/bin" # for wrapGAppsHook to wrap automatically
   ] ++ lib.optional useGTK2 "--with-gtk2";
 
+  postPatch = ''
+    # exo-csource has been dropped from exo, and replaced by xdt-csource from xfce4-dev-tools
+    for f in configure.ac src/Makefile.am; do
+      substituteInPlace $f --replace exo-csource xdt-csource
+    done
+  '';
+
   preConfigure = ''
     configureFlagsArray+=( --enable-at-spi-command="${at-spi2-core}/libexec/at-spi-bus-launcher --launch-immediately" )
   '';
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 7b3c21569870..fc7399ab2b68 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -25503,7 +25503,7 @@ in
   };
 
   lightdm_gtk_greeter = callPackage ../applications/display-managers/lightdm/gtk-greeter.nix {
-    inherit (xfce) exo;
+    inherit (xfce) xfce4-dev-tools;
   };
 
   lightdm-mini-greeter = callPackage ../applications/display-managers/lightdm-mini-greeter { };