diff --git a/pkgs/development/libraries/libgudev/default.nix b/pkgs/development/libraries/libgudev/default.nix
index 59df64e63558a..845caf57caa90 100644
--- a/pkgs/development/libraries/libgudev/default.nix
+++ b/pkgs/development/libraries/libgudev/default.nix
@@ -1,4 +1,5 @@
-{ lib, stdenv
+{ stdenv
+, lib
 , fetchurl
 , pkg-config
 , meson
@@ -9,42 +10,23 @@
 , vala
 , gobject-introspection
 , fetchpatch
+, glibcLocales
+, umockdev
 }:
 
-stdenv.mkDerivation rec {
+stdenv.mkDerivation (finalAttrs: {
   pname = "libgudev";
-  version = "237";
+  version = "238";
 
   outputs = [ "out" "dev" ];
 
   src = fetchurl {
-    url = "mirror://gnome/sources/${pname}/${lib.versions.majorMinor version}/${pname}-${version}.tar.xz";
-    sha256 = "1al6nr492nzbm8ql02xhzwci2kwb1advnkaky3j9636jf08v41hd";
+    url = "mirror://gnome/sources/libgudev/${lib.versions.majorMinor finalAttrs.version}/libgudev-${finalAttrs.version}.tar.xz";
+    hash = "sha256-YSZqsa/J1z28YKiyr3PpnS/f9H2ZVE0IV2Dk+mZ7XdE=";
   };
 
-  patches = [
-    # https://gitlab.gnome.org/GNOME/libgudev/-/merge_requests/27
-    (fetchpatch {
-      name = "gir-dep";
-      url = "https://gitlab.gnome.org/GNOME/libgudev/-/commit/6bdde16a0cfde462502fce1d9a7eb6ec33f388bb.diff";
-      sha256 = "sha256-bDtLUxOLEgyJURshqEQC4YCBTUVzQQP4qoWL786b3Z8=";
-    })
-    (fetchpatch {
-      name = "vapi-dep";
-      url = "https://gitlab.gnome.org/GNOME/libgudev/-/commit/d1f6457910842ba869c9871e7a2131fbe0d6b6be.diff";
-      sha256 = "sha256-/PY8ziZST/vQvksJm69a3O6/YesknIxCDvj0z40piik=";
-    })
-    (fetchpatch {
-      name = "gtk-doc-dep";
-      url = "https://gitlab.gnome.org/GNOME/libgudev/-/commit/34336cbadbcaac8b9b029f730eed0bdf4c633617.diff";
-      sha256 = "sha256-Bk05xe69LGqWH1uhLMZhwbVMSsCTyBrrOvqWic2TTd4=";
-    })
-  ];
-
   strictDeps = true;
 
-  depsBuildBuild = [ pkg-config ];
-
   nativeBuildInputs = [
     pkg-config
     meson
@@ -59,14 +41,16 @@ stdenv.mkDerivation rec {
     glib
   ];
 
-  mesonFlags = [
-    # There's a dependency cycle with umockdev and the tests fail to LD_PRELOAD anyway
-    "-Dtests=disabled"
+  checkInputs = [
+    glibcLocales
+    umockdev
   ];
 
+  doCheck = true;
+
   passthru = {
     updateScript = gnome.updateScript {
-      packageName = pname;
+      packageName = "libgudev";
       versionPolicy = "none";
     };
   };
@@ -78,4 +62,4 @@ stdenv.mkDerivation rec {
     platforms = platforms.linux;
     license = licenses.lgpl2Plus;
   };
-}
+})
diff --git a/pkgs/development/libraries/umockdev/default.nix b/pkgs/development/libraries/umockdev/default.nix
index b40f465546d98..cb1a8dccffd18 100644
--- a/pkgs/development/libraries/umockdev/default.nix
+++ b/pkgs/development/libraries/umockdev/default.nix
@@ -18,14 +18,14 @@
 , which
 }:
 
-stdenv.mkDerivation rec {
+stdenv.mkDerivation (finalAttrs: {
   pname = "umockdev";
   version = "0.17.17";
 
   outputs = [ "bin" "out" "dev" "devdoc" ];
 
   src = fetchurl {
-    url = "https://github.com/martinpitt/umockdev/releases/download/${version}/${pname}-${version}.tar.xz";
+    url = "https://github.com/martinpitt/umockdev/releases/download/${finalAttrs.version}/umockdev-${finalAttrs.version}.tar.xz";
     sha256 = "sha256-IOYhseRYsyADz+qZc5tngkuGZShUqLzjPiYSTjR/32w=";
   };
 
@@ -50,10 +50,13 @@ stdenv.mkDerivation rec {
   buildInputs = [
     glib
     systemd
-    libgudev
     libpcap
   ];
 
+  checkInputs = lib.optionals finalAttrs.passthru.withGudev [
+    libgudev
+  ];
+
   nativeCheckInputs = [
     python3
     which
@@ -81,12 +84,25 @@ stdenv.mkDerivation rec {
     ln -s "$PWD/libumockdev-preload.so.0" "$out/lib/libumockdev-preload.so.0"
   '';
 
+  passthru = {
+    # libgudev is needed for an optional test but it itself relies on umockdev for testing.
+    withGudev = false;
+
+    tests = {
+      withGudev = finalAttrs.finalPackage.overrideAttrs (attrs: {
+        passthru = attrs.passthru // {
+          withGudev = true;
+        };
+      });
+    };
+  };
+
   meta = with lib; {
     homepage = "https://github.com/martinpitt/umockdev";
-    changelog = "https://github.com/martinpitt/umockdev/releases/tag/${version}";
+    changelog = "https://github.com/martinpitt/umockdev/releases/tag/${finalAttrs.version}";
     description = "Mock hardware devices for creating unit tests";
     license = licenses.lgpl21Plus;
     maintainers = with maintainers; [ flokli ];
     platforms = with platforms; linux;
   };
-}
+})