diff --git a/pkgs/tools/networking/tcpdump/default.nix b/pkgs/tools/networking/tcpdump/default.nix
index 8b4850a6347..58f020e1bdd 100644
--- a/pkgs/tools/networking/tcpdump/default.nix
+++ b/pkgs/tools/networking/tcpdump/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, libpcap }:
+{ stdenv, fetchurl, libpcap, perl }:
 
 stdenv.mkDerivation rec {
   name = "tcpdump-${version}";
@@ -16,6 +16,12 @@ stdenv.mkDerivation rec {
   #   sha256 = "1vzrvn1q7x28h18yskqc390y357pzpg5xd3pzzj4xz3llnvsr64p";
   # };
 
+  postPatch = ''
+    patchShebangs tests
+  '';
+
+  checkInputs = [ perl ];
+
   buildInputs = [ libpcap ];
 
   configureFlags = stdenv.lib.optional