diff --git a/default.nix b/default.nix
index 362a0d1..f4fc7dd 100644
--- a/default.nix
+++ b/default.nix
@@ -15,5 +15,16 @@ stdenv.mkDerivation {
   postInstall = ''
     rm $out/share/uninsane-dot-org/404.html
   '';
+
+  installCheckPhase = ''
+    runHook preInstallCheck
+
+    test -f $out/share/uninsane-dot-org/atom.xml
+
+    runHook postInstallCheck
+  '';
+
+  doInstallCheck = true;
+
   installFlags = [ "PREFIX=$(out)/share/uninsane-dot-org" ];
 }