diff --git a/pkgs/tools/system/fakeroot/default.nix b/pkgs/tools/system/fakeroot/default.nix
index c4d3845df803..ad75374e3093 100644
--- a/pkgs/tools/system/fakeroot/default.nix
+++ b/pkgs/tools/system/fakeroot/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchurl, fetchpatch, getopt, libcap, gnused }:
+{ lib, stdenv, fetchurl, fetchpatch, getopt, libcap, gnused, nixosTests }:
 
 stdenv.mkDerivation rec {
   version = "1.23";
@@ -65,6 +65,13 @@ stdenv.mkDerivation rec {
     patch -p1 < ${patch-wraptmpf}
   '';
 
+  passthru = {
+    tests = {
+      # A lightweight *unit* test that exercises fakeroot and fakechroot together:
+      nixos-etc = nixosTests.etc.test-etc-fakeroot;
+    };
+  };
+
   meta = {
     homepage = "https://salsa.debian.org/clint/fakeroot";
     description = "Give a fake root environment through LD_PRELOAD";