diff --git a/pkgs/tools/package-management/packagekit/default.nix b/pkgs/tools/package-management/packagekit/default.nix
index 45a37d4762ca..7f75f2868232 100644
--- a/pkgs/tools/package-management/packagekit/default.nix
+++ b/pkgs/tools/package-management/packagekit/default.nix
@@ -32,7 +32,7 @@
 
 stdenv.mkDerivation (finalAttrs: {
   pname = "packagekit";
-  version = "1.3.5";
+  version = "1.4.0";
 
   outputs = [
     "out"
@@ -44,7 +44,7 @@ stdenv.mkDerivation (finalAttrs: {
     owner = "PackageKit";
     repo = "PackageKit";
     rev = "v${finalAttrs.version}";
-    hash = "sha256-aKucwqwNyZWyHfNu9ntzSwD+eQy8KjCt6RVMjjjZmZg=";
+    hash = "sha256-okmbeM/Iv4DKKl21gDCRvMtYG/xcQ1N/rayH9YH0gN0=";
   };
 
   buildInputs = [
@@ -96,13 +96,15 @@ stdenv.mkDerivation (finalAttrs: {
     # HACK: we want packagekit to look in /etc for configs but install
     # those files in $out/etc ; we just override the runtime paths here
     # same for /var & $out/var
-    substituteInPlace etc/meson.build \
+    substituteInPlace data/config/meson.build \
       --replace-fail "install_dir: join_paths(get_option('sysconfdir'), 'PackageKit')" "install_dir: join_paths('$out', 'etc', 'PackageKit')"
     substituteInPlace data/meson.build \
       --replace-fail "install_dir: join_paths(get_option('localstatedir'), 'lib', 'PackageKit')," "install_dir: join_paths('$out', 'var', 'lib', 'PackageKit'),"
     substituteInPlace client/meson.build \
       --replace-fail http://docbook.sourceforge.net/release/xsl-ns/current ${docbook_xsl_ns}/share/xml/docbook-xsl-ns
 
+    # Fix /usr/bin/env python3 not being available.
+    patchShebangs tests/runner/setup-test-root.py
   '';
 
   passthru.tests = {