From 48300199566229bd1409eb8f1f2cf8b8871d6b67 Mon Sep 17 00:00:00 2001
From: John Ericson <John.Ericson@Obsidian.Systems>
Date: Thu, 10 May 2018 12:55:36 -0400
Subject: [PATCH] libpcap: Remove crossAttrs

---
 .../development/libraries/libpcap/default.nix | 20 +++++++++----------
 1 file changed, 10 insertions(+), 10 deletions(-)

diff --git a/pkgs/development/libraries/libpcap/default.nix b/pkgs/development/libraries/libpcap/default.nix
index bef5f9a9da34..945554386930 100644
--- a/pkgs/development/libraries/libpcap/default.nix
+++ b/pkgs/development/libraries/libpcap/default.nix
@@ -12,10 +12,16 @@ stdenv.mkDerivation rec {
 
   # We need to force the autodetection because detection doesn't
   # work in pure build enviroments.
-  configureFlags =
-    if stdenv.isLinux then [ "--with-pcap=linux" ]
-    else if stdenv.isDarwin then [ "--with-pcap=bpf" ]
-    else [];
+  configureFlags = [
+    ("--with-pcap=" + {
+      linux = "linux";
+      darwin = "bpf";
+    }.${stdenv.hostPlatform.parsed.kernel.name})
+  ] ++ stdenv.lib.optionals (stdenv.hostPlatform == stdenv.buildPlatform) [
+    "ac_cv_linux_vers=2"
+  ];
+
+  dontStrip = stdenv.hostPlatform != stdenv.buildPlatform;
 
   prePatch = stdenv.lib.optionalString stdenv.isDarwin ''
     substituteInPlace configure --replace " -arch i386" ""
@@ -39,12 +45,6 @@ stdenv.mkDerivation rec {
 
   preInstall = ''mkdir -p $out/bin'';
 
-  crossAttrs = {
-    # Stripping hurts in static libraries
-    dontStrip = true;
-    configureFlags = configureFlags ++ [ "ac_cv_linux_vers=2" ];
-  };
-
   meta = with stdenv.lib; {
     homepage = http://www.tcpdump.org;
     description = "Packet Capture Library";