diff --git a/pkgs/applications/misc/font-manager/default.nix b/pkgs/applications/misc/font-manager/default.nix
index ee8766f766f..bf97cff5030 100644
--- a/pkgs/applications/misc/font-manager/default.nix
+++ b/pkgs/applications/misc/font-manager/default.nix
@@ -49,10 +49,6 @@ stdenv.mkDerivation rec {
     patchShebangs meson_post_install.py
   '';
 
-  postInstall = ''
-    rm $out/share/applications/mimeinfo.cache
-  '';
-
   meta = {
     homepage = https://fontmanager.github.io/;
     description = "Simple font management for GTK+ desktop environments";
diff --git a/pkgs/development/tools/profiling/sysprof/default.nix b/pkgs/development/tools/profiling/sysprof/default.nix
index 3945af2794d..8cd6a3f09ee 100644
--- a/pkgs/development/tools/profiling/sysprof/default.nix
+++ b/pkgs/development/tools/profiling/sysprof/default.nix
@@ -46,10 +46,6 @@ in stdenv.mkDerivation rec {
     "-Dsystemdunitdir=lib/systemd/system"
   ];
 
-  postInstall = ''
-    rm $out/share/applications/mimeinfo.cache
-  '';
-
   passthru = {
     updateScript = gnome3.updateScript {
       packageName = pname;
diff --git a/pkgs/tools/misc/desktop-file-utils/default.nix b/pkgs/tools/misc/desktop-file-utils/default.nix
index 8dc590c5d6f..3e47ebd51d7 100644
--- a/pkgs/tools/misc/desktop-file-utils/default.nix
+++ b/pkgs/tools/misc/desktop-file-utils/default.nix
@@ -21,6 +21,8 @@ stdenv.mkDerivation rec {
   nativeBuildInputs = [ pkgconfig ];
   buildInputs = [ glib libintl ];
 
+  setupHook = ./setup-hook.sh;
+
   meta = {
     homepage = http://www.freedesktop.org/wiki/Software/desktop-file-utils;
     description = "Command line utilities for working with .desktop files";
diff --git a/pkgs/tools/misc/desktop-file-utils/setup-hook.sh b/pkgs/tools/misc/desktop-file-utils/setup-hook.sh
new file mode 100644
index 00000000000..004d635cff0
--- /dev/null
+++ b/pkgs/tools/misc/desktop-file-utils/setup-hook.sh
@@ -0,0 +1,6 @@
+# Remove mimeinfo cache
+mimeinfoPreFixupPhase() {
+    rm -f $out/share/applications/mimeinfo.cache
+}
+
+preFixupPhases="$preFixupPhases mimeinfoPreFixupPhase"