1 files changed, 12 insertions, 4 deletions
diff --git a/pkgs/development/libraries/glibmm/default.nix b/pkgs/development/libraries/glibmm/default.nix
index a3af96d51edc..3c3b49e66161 100644
--- a/pkgs/development/libraries/glibmm/default.nix
+++ b/pkgs/development/libraries/glibmm/default.nix
@@ -1,19 +1,27 @@
-{ stdenv, fetchurl, pkgconfig, gnum4, glib, libsigcxx }:
+{ stdenv, fetchurl, fetchpatch, pkgconfig, gnum4, glib, libsigcxx }:
 
 let
-  ver_maj = "2.54";
-  ver_min = "1";
+  ver_maj = "2.56";
+  ver_min = "0";
 in
 stdenv.mkDerivation rec {
   name = "glibmm-${ver_maj}.${ver_min}";
 
   src = fetchurl {
     url = "mirror://gnome/sources/glibmm/${ver_maj}/${name}.tar.xz";
-    sha256 = "0jkapw18icz59cmlmsl00nwwz0wh291kb4hc9z9hxmq45drqrhkw";
+    sha256 = "1abrkqhca5p8n6ly3vp1232rny03s7lrd8f8iz2m2m141nxgqx3f";
   };
 
   outputs = [ "out" "dev" ];
 
+  patchFlags = "-p0";
+  patches = [
+    (fetchpatch {
+      url = "https://raw.githubusercontent.com/macports/macports-ports/e864b2340be9ef003d8ff4aef92e7151d06287dd/devel/glibmm/files/0001-ustring-Fix-wchar-conversion-on-macOS-with-libc.patch";
+      sha256 = "02qvnailw1i59cjbj3cy7y02kfcivsvkdjrf4njkp4plarayyqp9";
+    })
+  ];
+
   nativeBuildInputs = [ pkgconfig gnum4 ];
   propagatedBuildInputs = [ glib libsigcxx ];