emojione: fix build with Inkscape 1

pkgs/data/fonts/emojione/default.nix

@@ -1,4 +1,4 @@
-{ stdenv, fetchFromGitHub, inkscape, imagemagick, potrace, svgo, scfbuild }:
+{ stdenv, fetchFromGitHub, fetchpatch, inkscape, imagemagick, potrace, svgo, scfbuild }:
 
 stdenv.mkDerivation rec {
   pname = "emojione";
@@ -11,6 +11,22 @@ stdenv.mkDerivation rec {
     sha256 = "1781kxfbhnvylypbkwxc3mx6hi0gcjisfjr9cf0jdz4d1zkf09b3";
   };
 
+  patches = [
+    # Fix build with Inkscape 1.0
+    # https://github.com/eosrei/twemoji-color-font/pull/82
+    (fetchpatch {
+      url = "https://github.com/eosrei/twemoji-color-font/commit/208ad63c2ceb38c528b5237abeb2b85ceedc1d37.patch";
+      sha256 = "7tDWIkpcdir1V6skgXSM3r0FwHy0F6PyJ07OPRsSStA=";
+      postFetch = ''
+        substituteInPlace $out \
+          --replace "inkscape --without-gui" "inkscape --export-png" \
+          --replace TWEMOJI EMOJIONE \
+          --replace "the assets" "the emojione assets" \
+          --replace twemoji emojione
+      '';
+    })
+  ];
+
   preBuild = ''
     sed -i 's,SCFBUILD :=.*,SCFBUILD := scfbuild,' Makefile
     # Shut up inkscape's warnings