diff --git a/pkgs/applications/networking/browsers/mullvad-browser/default.nix b/pkgs/applications/networking/browsers/mullvad-browser/default.nix
index 98b9b08af6bf..627056795ce4 100644
--- a/pkgs/applications/networking/browsers/mullvad-browser/default.nix
+++ b/pkgs/applications/networking/browsers/mullvad-browser/default.nix
@@ -210,10 +210,14 @@ stdenv.mkDerivation rec {
     runHook postBuild
   '';
 
-  postInstall = ''
+  installPhase = ''
+    runHook preInstall
+
     # Install distribution customizations
     install -Dvm644 ${distributionIni} $out/share/mullvad-browser/distribution/distribution.ini
     install -Dvm644 ${policiesJson} $out/share/mullvad-browser/distribution/policies.json
+
+    runHook postInstall
   '';
 
   meta = with lib; {