libbpf: add some key reverse dependencies to passthru.tests

pkgs/os-specific/linux/libbpf/default.nix

@@ -4,7 +4,12 @@
 , stdenv
 , zlib
 , lib
+
+# for passthru.tests
+, knot-dns
 , nixosTests
+, systemd
+, tracee
 }:
 
 stdenv.mkDerivation rec {
@@ -25,7 +30,9 @@ stdenv.mkDerivation rec {
   makeFlags = [ "PREFIX=$(out)" "-C src" ];
 
   passthru.tests = {
+    inherit knot-dns tracee;
     bpf = nixosTests.bpf;
+    systemd = systemd.override { withLibBPF = true; };
   };
 
   postInstall = ''