diff --git a/pkgs/data/themes/mojave/default.nix b/pkgs/data/themes/mojave/default.nix
index d560e3fe5838..0bd71b46c0d9 100644
--- a/pkgs/data/themes/mojave/default.nix
+++ b/pkgs/data/themes/mojave/default.nix
@@ -1,15 +1,15 @@
-{ stdenv, fetchFromGitHub, fetchurl, gtk_engines, gtk-engine-murrine }:
+{ stdenv, fetchFromGitHub, fetchurl, glib, gtk-engine-murrine, gtk_engines, inkscape, optipng, sassc, which }:
 
 stdenv.mkDerivation rec {
   pname = "mojave-gtk-theme";
-  version = "2020-02-20";
+  version = "2020-03-19";
 
   srcs = [
     (fetchFromGitHub {
       owner = "vinceliuice";
       repo = pname;
       rev = version;
-      sha256 = "0fbpjfdx53g4qicr97jl1dssykjwwca9xzrfyh53dmd81vr6znpy";
+      sha256 = "1f120sx092i56q4dx2b8d3nnn9pdw67656446nw702rix7zc5jpx";
     })
     (fetchurl {
       url = "https://github.com/vinceliuice/Mojave-gtk-theme/raw/11741a99d96953daf9c27e44c94ae50a7247c0ed/macOS_Mojave_Wallpapers.tar.xz";
@@ -19,12 +19,32 @@ stdenv.mkDerivation rec {
 
   sourceRoot = "source";
 
+  nativeBuildInputs = [ glib inkscape optipng sassc which ];
+
   buildInputs = [ gtk_engines ];
 
   propagatedUserEnvPkgs = [ gtk-engine-murrine ];
 
-  installPhase = ''
+  postPatch = ''
     patchShebangs .
+
+    for f in render-assets.sh \
+             src/assets/gtk-2.0/render-assets.sh \
+             src/assets/gtk-3.0/common-assets/render-assets.sh \
+             src/assets/gtk-3.0/windows-assets/render-assets.sh \
+             src/assets/metacity-1/render-assets.sh \
+             src/assets/xfwm4/render-assets.sh
+    do
+      substituteInPlace $f \
+        --replace /usr/bin/inkscape ${inkscape}/bin/inkscape \
+        --replace /usr/bin/optipng ${optipng}/bin/optipng
+    done
+
+    # Shut up inkscape's warnings
+    export HOME="$NIX_BUILD_ROOT"
+  '';
+
+  installPhase = ''
     name= ./install.sh -d $out/share/themes
     install -D -t $out/share/wallpapers ../"macOS Mojave Wallpapers"/*
   '';