diff --git a/pkgs/development/compilers/gcc/4.8/default.nix b/pkgs/development/compilers/gcc/4.8/default.nix
index 74bb94335654..1808b95f34d2 100644
--- a/pkgs/development/compilers/gcc/4.8/default.nix
+++ b/pkgs/development/compilers/gcc/4.8/default.nix
@@ -25,7 +25,8 @@
 , libcCross ? null
 , crossStageStatic ? false
 , libpthread ? null, libpthreadCross ? null  # required for GNU/Hurd
-, stripped ? true
+, # Strip kills static libs of other archs (hence no cross)
+  stripped ? hostPlatform == buildPlatform && targetPlatform == hostPlatform
 , gnused ? null
 , darwin ? null
 , buildPlatform, hostPlatform, targetPlatform
@@ -371,9 +372,11 @@ stdenv.mkDerivation ({
 
   targetConfig = if targetPlatform != hostPlatform then targetPlatform.config else null;
 
-  buildFlags = if bootstrap then
-    (if profiledCompiler then "profiledbootstrap" else "bootstrap")
-    else "";
+  buildFlags = optional
+    (bootstrap && hostPlatform == buildPlatform)
+    (if profiledCompiler then "profiledbootstrap" else "bootstrap");
+
+  dontStrip = !stripped;
 
   doCheck = false; # requires a lot of tools, causes a dependency cycle for stdenv
 
@@ -382,12 +385,6 @@ stdenv.mkDerivation ({
     then "install-strip"
     else "install";
 
-  /* For cross-built gcc (build != host == target) */
-  crossAttrs =  {
-    dontStrip = true;
-    buildFlags = "";
-  };
-
   # http://gcc.gnu.org/install/specific.html#x86-64-x-solaris210
   ${if hostPlatform.system == "x86_64-solaris" then "CC" else null} = "gcc -m64";
 
@@ -489,8 +486,5 @@ stdenv.mkDerivation ({
   installTargets = "install-gcc install-target-libgcc";
 }
 
-# Strip kills static libs of other archs (hence targetPlatform != hostPlatform)
-// optionalAttrs (!stripped || targetPlatform != hostPlatform) { dontStrip = true; }
-
 // optionalAttrs (enableMultilib) { dontMoveLib64 = true; }
 )
diff --git a/pkgs/development/compilers/gcc/4.9/default.nix b/pkgs/development/compilers/gcc/4.9/default.nix
index 3976be0476ad..05305dead06a 100644
--- a/pkgs/development/compilers/gcc/4.9/default.nix
+++ b/pkgs/development/compilers/gcc/4.9/default.nix
@@ -25,7 +25,8 @@
 , libcCross ? null
 , crossStageStatic ? false
 , libpthread ? null, libpthreadCross ? null  # required for GNU/Hurd
-, stripped ? true
+, # Strip kills static libs of other archs (hence no cross)
+  stripped ? hostPlatform == buildPlatform && targetPlatform == hostPlatform
 , gnused ? null
 , darwin ? null
 , buildPlatform, hostPlatform, targetPlatform
@@ -393,9 +394,11 @@ stdenv.mkDerivation ({
 
   targetConfig = if targetPlatform != hostPlatform then targetPlatform.config else null;
 
-  buildFlags = if bootstrap then
-    (if profiledCompiler then "profiledbootstrap" else "bootstrap")
-    else "";
+  buildFlags = optional
+    (bootstrap && hostPlatform == buildPlatform)
+    (if profiledCompiler then "profiledbootstrap" else "bootstrap");
+
+  dontStrip = !stripped;
 
   doCheck = false; # requires a lot of tools, causes a dependency cycle for stdenv
 
@@ -404,12 +407,6 @@ stdenv.mkDerivation ({
     then "install-strip"
     else "install";
 
-  /* For cross-built gcc (build != host == target) */
-  crossAttrs = {
-    dontStrip = true;
-    buildFlags = "";
-  };
-
   # http://gcc.gnu.org/install/specific.html#x86-64-x-solaris210
   ${if hostPlatform.system == "x86_64-solaris" then "CC" else null} = "gcc -m64";
 
@@ -507,9 +504,6 @@ stdenv.mkDerivation ({
   installTargets = "install-gcc install-target-libgcc";
 }
 
-# Strip kills static libs of other archs (hence targetPlatform != hostPlatform)
-// optionalAttrs (!stripped || targetPlatform != hostPlatform) { dontStrip = true; }
-
 // optionalAttrs (enableMultilib) { dontMoveLib64 = true; }
 
 // optionalAttrs (langJava) {
diff --git a/pkgs/development/compilers/gcc/5/default.nix b/pkgs/development/compilers/gcc/5/default.nix
index 1179be7d79c7..3d9f471e5030 100644
--- a/pkgs/development/compilers/gcc/5/default.nix
+++ b/pkgs/development/compilers/gcc/5/default.nix
@@ -25,7 +25,8 @@
 , libcCross ? null
 , crossStageStatic ? false
 , libpthread ? null, libpthreadCross ? null  # required for GNU/Hurd
-, stripped ? true
+, # Strip kills static libs of other archs (hence no cross)
+  stripped ? hostPlatform == buildPlatform && targetPlatform == hostPlatform
 , gnused ? null
 , cloog # unused; just for compat with gcc4, as we override the parameter on some places
 , darwin ? null
@@ -396,9 +397,11 @@ stdenv.mkDerivation ({
 
   targetConfig = if targetPlatform != hostPlatform then targetPlatform.config else null;
 
-  buildFlags = if bootstrap then
-    (if profiledCompiler then "profiledbootstrap" else "bootstrap")
-    else "";
+  buildFlags = optional
+    (bootstrap && hostPlatform == buildPlatform)
+    (if profiledCompiler then "profiledbootstrap" else "bootstrap");
+
+  dontStrip = !stripped;
 
   doCheck = false; # requires a lot of tools, causes a dependency cycle for stdenv
 
@@ -407,12 +410,6 @@ stdenv.mkDerivation ({
     then "install-strip"
     else "install";
 
-  /* For cross-built gcc (build != host == target) */
-  crossAttrs = {
-    dontStrip = true;
-    buildFlags = "";
-  };
-
   # http://gcc.gnu.org/install/specific.html#x86-64-x-solaris210
   ${if hostPlatform.system == "x86_64-solaris" then "CC" else null} = "gcc -m64";
 
@@ -510,8 +507,5 @@ stdenv.mkDerivation ({
   installTargets = "install-gcc install-target-libgcc";
 }
 
-# Strip kills static libs of other archs (hence targetPlatform != hostPlatform)
-// optionalAttrs (!stripped || targetPlatform != hostPlatform) { dontStrip = true; }
-
 // optionalAttrs (enableMultilib) { dontMoveLib64 = true; }
 )
diff --git a/pkgs/development/compilers/gcc/6/default.nix b/pkgs/development/compilers/gcc/6/default.nix
index e2d69c059829..1f56f6e573ed 100644
--- a/pkgs/development/compilers/gcc/6/default.nix
+++ b/pkgs/development/compilers/gcc/6/default.nix
@@ -25,7 +25,8 @@
 , libcCross ? null
 , crossStageStatic ? false
 , libpthread ? null, libpthreadCross ? null  # required for GNU/Hurd
-, stripped ? true
+, # Strip kills static libs of other archs (hence no cross)
+  stripped ? hostPlatform == buildPlatform && targetPlatform == hostPlatform
 , gnused ? null
 , cloog # unused; just for compat with gcc4, as we override the parameter on some places
 , darwin ? null
@@ -400,8 +401,11 @@ stdenv.mkDerivation ({
 
   targetConfig = if targetPlatform != hostPlatform then targetPlatform.config else null;
 
-  buildFlags =
-    optional bootstrap (if profiledCompiler then "profiledbootstrap" else "bootstrap");
+  buildFlags = optional
+    (bootstrap && hostPlatform == buildPlatform)
+    (if profiledCompiler then "profiledbootstrap" else "bootstrap");
+
+  dontStrip = !stripped;
 
   doCheck = false; # requires a lot of tools, causes a dependency cycle for stdenv
 
@@ -410,12 +414,6 @@ stdenv.mkDerivation ({
     then "install-strip"
     else "install";
 
-  /* For cross-built gcc (build != host == target) */
-  crossAttrs = {
-    dontStrip = true;
-    buildFlags = "";
-  };
-
   # http://gcc.gnu.org/install/specific.html#x86-64-x-solaris210
   ${if hostPlatform.system == "x86_64-solaris" then "CC" else null} = "gcc -m64";
 
@@ -513,9 +511,6 @@ stdenv.mkDerivation ({
   installTargets = "install-gcc install-target-libgcc";
 }
 
-# Strip kills static libs of other archs (hence targetPlatform != hostPlatform)
-// optionalAttrs (!stripped || targetPlatform != hostPlatform) { dontStrip = true; }
-
 // optionalAttrs (enableMultilib) { dontMoveLib64 = true; }
 
 // optionalAttrs (langJava) {
diff --git a/pkgs/development/compilers/gcc/7/default.nix b/pkgs/development/compilers/gcc/7/default.nix
index c25c2a260295..b5da4c8c7666 100644
--- a/pkgs/development/compilers/gcc/7/default.nix
+++ b/pkgs/development/compilers/gcc/7/default.nix
@@ -18,7 +18,8 @@
 , libcCross ? null
 , crossStageStatic ? false
 , libpthread ? null, libpthreadCross ? null  # required for GNU/Hurd
-, stripped ? true
+, # Strip kills static libs of other archs (hence no cross)
+  stripped ? hostPlatform == buildPlatform && targetPlatform == hostPlatform
 , gnused ? null
 , cloog # unused; just for compat with gcc4, as we override the parameter on some places
 , darwin ? null
@@ -352,8 +353,11 @@ stdenv.mkDerivation ({
 
   targetConfig = if targetPlatform != hostPlatform then targetPlatform.config else null;
 
-  buildFlags =
-    optional bootstrap (if profiledCompiler then "profiledbootstrap" else "bootstrap");
+  buildFlags = optional
+    (bootstrap && hostPlatform == buildPlatform)
+    (if profiledCompiler then "profiledbootstrap" else "bootstrap");
+
+  dontStrip = !stripped;
 
   doCheck = false; # requires a lot of tools, causes a dependency cycle for stdenv
 
@@ -362,12 +366,6 @@ stdenv.mkDerivation ({
     then "install-strip"
     else "install";
 
-  /* For cross-built gcc (build != host == target) */
-  crossAttrs = {
-    dontStrip = true;
-    buildFlags = "";
-  };
-
   # http://gcc.gnu.org/install/specific.html#x86-64-x-solaris210
   ${if hostPlatform.system == "x86_64-solaris" then "CC" else null} = "gcc -m64";
 
@@ -454,8 +452,5 @@ stdenv.mkDerivation ({
   installTargets = "install-gcc install-target-libgcc";
 }
 
-# Strip kills static libs of other archs (hence targetPlatform != hostPlatform)
-// optionalAttrs (!stripped || targetPlatform != hostPlatform) { dontStrip = true; }
-
 // optionalAttrs (enableMultilib) { dontMoveLib64 = true; }
 )
diff --git a/pkgs/development/compilers/gcc/8/default.nix b/pkgs/development/compilers/gcc/8/default.nix
index 2465e6149c0a..239735bc6574 100644
--- a/pkgs/development/compilers/gcc/8/default.nix
+++ b/pkgs/development/compilers/gcc/8/default.nix
@@ -18,7 +18,8 @@
 , libcCross ? null
 , crossStageStatic ? false
 , libpthread ? null, libpthreadCross ? null  # required for GNU/Hurd
-, stripped ? true
+, # Strip kills static libs of other archs (hence no cross)
+  stripped ? hostPlatform == buildPlatform && targetPlatform == hostPlatform
 , gnused ? null
 , cloog # unused; just for compat with gcc4, as we override the parameter on some places
 , darwin ? null
@@ -347,20 +348,17 @@ stdenv.mkDerivation ({
 
   targetConfig = if targetPlatform != hostPlatform then targetPlatform.config else null;
 
-  buildFlags =
-    optional bootstrap (if profiledCompiler then "profiledbootstrap" else "bootstrap");
+  buildFlags = optional
+    (bootstrap && hostPlatform == buildPlatform)
+    (if profiledCompiler then "profiledbootstrap" else "bootstrap");
+
+  dontStrip = !stripped;
 
   installTargets =
     if stripped
     then "install-strip"
     else "install";
 
-  /* For cross-built gcc (build != host == target) */
-  crossAttrs = {
-    dontStrip = true;
-    buildFlags = "";
-  };
-
   # http://gcc.gnu.org/install/specific.html#x86-64-x-solaris210
   ${if hostPlatform.system == "x86_64-solaris" then "CC" else null} = "gcc -m64";
 
@@ -447,8 +445,5 @@ stdenv.mkDerivation ({
   installTargets = "install-gcc install-target-libgcc";
 }
 
-# Strip kills static libs of other archs (hence targetPlatform != hostPlatform)
-// optionalAttrs (!stripped || targetPlatform != hostPlatform) { dontStrip = true; }
-
 // optionalAttrs (enableMultilib) { dontMoveLib64 = true; }
 )
diff --git a/pkgs/development/compilers/gcc/snapshot/default.nix b/pkgs/development/compilers/gcc/snapshot/default.nix
index ed7634b87db3..1af8c75669ed 100644
--- a/pkgs/development/compilers/gcc/snapshot/default.nix
+++ b/pkgs/development/compilers/gcc/snapshot/default.nix
@@ -18,7 +18,8 @@
 , libcCross ? null
 , crossStageStatic ? false
 , libpthread ? null, libpthreadCross ? null  # required for GNU/Hurd
-, stripped ? true
+, # Strip kills static libs of other archs (hence no cross)
+  stripped ? hostPlatform == buildPlatform && targetPlatform == hostPlatform
 , gnused ? null
 , cloog # unused; just for compat with gcc4, as we override the parameter on some places
 , darwin ? null
@@ -318,17 +319,14 @@ stdenv.mkDerivation ({
     (if profiledCompiler then "profiledbootstrap" else "bootstrap")
     else "";
 
+  dontStrip = !stripped;
+  NIX_STRIP_DEBUG = !stripped;
+
   installTargets =
     if stripped
     then "install-strip"
     else "install";
 
-  /* For cross-built gcc (build != host == target) */
-  crossAttrs = {
-    dontStrip = true;
-    buildFlags = "";
-  };
-
   # http://gcc.gnu.org/install/specific.html#x86-64-x-solaris210
   ${if hostPlatform.system == "x86_64-solaris" then "CC" else null} = "gcc -m64";
 
@@ -417,8 +415,5 @@ stdenv.mkDerivation ({
   installTargets = "install-gcc install-target-libgcc";
 }
 
-# Strip kills static libs of other archs (hence targetPlatform != hostPlatform)
-// optionalAttrs (!stripped || targetPlatform != hostPlatform) { dontStrip = true; NIX_STRIP_DEBUG = 0; }
-
 // optionalAttrs (enableMultilib) { dontMoveLib64 = true; }
 )
diff --git a/pkgs/development/libraries/libmsgpack/generic.nix b/pkgs/development/libraries/libmsgpack/generic.nix
index 889ef1347732..947960d23592 100644
--- a/pkgs/development/libraries/libmsgpack/generic.nix
+++ b/pkgs/development/libraries/libmsgpack/generic.nix
@@ -13,13 +13,12 @@ stdenv.mkDerivation rec {
 
   enableParallelBuilding = true;
 
-  crossAttrs = {
-  } // stdenv.lib.optionalAttrs (hostPlatform.libc == "msvcrt") {
-    cmakeFlags = [
-      "-DMSGPACK_BUILD_EXAMPLES=OFF"
-      "-DCMAKE_SYSTEM_NAME=Windows"
-    ];
-  };
+  cmakeFlags = []
+    ++ stdenv.lib.optional (stdenv.hostPlatform != stdenv.buildPlatform)
+                           "-DMSGPACK_BUILD_EXAMPLES=OFF"
+    ++ stdenv.lib.optional (hostPlatform.libc == "msvcrt")
+                           "-DCMAKE_SYSTEM_NAME=Windows"
+    ;
 
   meta = with stdenv.lib; {
     description = "MessagePack implementation for C and C++";
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";
diff --git a/pkgs/development/libraries/librsync/0.9.nix b/pkgs/development/libraries/librsync/0.9.nix
index 0954694cf290..115f4cd90a0c 100644
--- a/pkgs/development/libraries/librsync/0.9.nix
+++ b/pkgs/development/libraries/librsync/0.9.nix
@@ -12,9 +12,7 @@ stdenv.mkDerivation {
 
   configureFlags = if stdenv.isCygwin then "--enable-static" else "--enable-shared";
 
-  crossAttrs = {
-    dontStrip = true;
-  };
+  dontStrip = stdenv.hostPlatform != stdenv.buildPlatform;
 
   meta = {
     homepage = http://librsync.sourceforge.net/;
diff --git a/pkgs/development/libraries/librsync/default.nix b/pkgs/development/libraries/librsync/default.nix
index 80acaf57d625..afb83051b211 100644
--- a/pkgs/development/libraries/librsync/default.nix
+++ b/pkgs/development/libraries/librsync/default.nix
@@ -14,9 +14,7 @@ stdenv.mkDerivation rec {
   nativeBuildInputs = [ cmake ];
   buildInputs = [ perl zlib bzip2 popt ];
 
-  crossAttrs = {
-    dontStrip = true;
-  };
+  dontStrip = stdenv.hostPlatform != stdenv.buildPlatform;
 
   meta = with stdenv.lib; {
     homepage = http://librsync.sourceforge.net/;
diff --git a/pkgs/development/libraries/libvpx/default.nix b/pkgs/development/libraries/libvpx/default.nix
index 466ffa0cf181..731892d33b4d 100644
--- a/pkgs/development/libraries/libvpx/default.nix
+++ b/pkgs/development/libraries/libvpx/default.nix
@@ -72,6 +72,7 @@ stdenv.mkDerivation rec {
   outputs = [ "bin" "dev" "out" ];
   setOutputFlags = false;
 
+  configurePlatforms = [];
   configureFlags = [
     (enableFeature (vp8EncoderSupport || vp8DecoderSupport) "vp8")
     (enableFeature vp8EncoderSupport "vp8-encoder")
@@ -131,8 +132,29 @@ stdenv.mkDerivation rec {
     (enableFeature (experimentalSpatialSvcSupport ||
                     experimentalFpMbStatsSupport ||
                     experimentalEmulateHardwareSupport) "experimental")
-    # Experimental features
-  ] ++ optional experimentalSpatialSvcSupport "--enable-spatial-svc"
+  ] ++ optionals (stdenv.hostPlatform != stdenv.buildPlatform) [
+    #"--extra-cflags="
+    #"--extra-cxxflags="
+    #"--prefix="
+    #"--libc="
+    #"--libdir="
+    "--enable-external-build"
+    # libvpx darwin targets include darwin version (ie. ARCH-darwinXX-gcc, XX being the darwin version)
+    # See all_platforms: https://github.com/webmproject/libvpx/blob/master/configure
+    # Darwin versions: 10.4=8, 10.5=9, 10.6=10, 10.7=11, 10.8=12, 10.9=13, 10.10=14
+    "--force-target=${hostPlatform.config}${
+            if hostPlatform.isDarwin then
+              if      hostPlatform.osxMinVersion == "10.10" then "14"
+              else if hostPlatform.osxMinVersion == "10.9"  then "13"
+              else if hostPlatform.osxMinVersion == "10.8"  then "12"
+              else if hostPlatform.osxMinVersion == "10.7"  then "11"
+              else if hostPlatform.osxMinVersion == "10.6"  then "10"
+              else if hostPlatform.osxMinVersion == "10.5"  then "9"
+              else "8"
+            else ""}-gcc"
+    (if hostPlatform.isCygwin then "--enable-static-msvcrt" else "")
+  ] # Experimental features
+    ++ optional experimentalSpatialSvcSupport "--enable-spatial-svc"
     ++ optional experimentalFpMbStatsSupport "--enable-fp-mb-stats"
     ++ optional experimentalEmulateHardwareSupport "--enable-emulate-hardware";
 
@@ -145,32 +167,6 @@ stdenv.mkDerivation rec {
 
   postInstall = ''moveToOutput bin "$bin" '';
 
-  crossAttrs = {
-    configurePlatforms = [];
-    configureFlags = configureFlags ++ [
-      #"--extra-cflags="
-      #"--extra-cxxflags="
-      #"--prefix="
-      #"--libc="
-      #"--libdir="
-      "--enable-external-build"
-      # libvpx darwin targets include darwin version (ie. ARCH-darwinXX-gcc, XX being the darwin version)
-      # See all_platforms: https://github.com/webmproject/libvpx/blob/master/configure
-      # Darwin versions: 10.4=8, 10.5=9, 10.6=10, 10.7=11, 10.8=12, 10.9=13, 10.10=14
-      "--force-target=${hostPlatform.config}${
-              if hostPlatform.isDarwin then
-                if      hostPlatform.osxMinVersion == "10.10" then "14"
-                else if hostPlatform.osxMinVersion == "10.9"  then "13"
-                else if hostPlatform.osxMinVersion == "10.8"  then "12"
-                else if hostPlatform.osxMinVersion == "10.7"  then "11"
-                else if hostPlatform.osxMinVersion == "10.6"  then "10"
-                else if hostPlatform.osxMinVersion == "10.5"  then "9"
-                else "8"
-              else ""}-gcc"
-      (if hostPlatform.isCygwin then "--enable-static-msvcrt" else "")
-    ];
-  };
-
   meta = with stdenv.lib; {
     description = "WebM VP8/VP9 codec SDK";
     homepage    = https://www.webmproject.org/;
diff --git a/pkgs/development/libraries/libvpx/git.nix b/pkgs/development/libraries/libvpx/git.nix
index e2b94dda28e7..7d4b75d6cdf8 100644
--- a/pkgs/development/libraries/libvpx/git.nix
+++ b/pkgs/development/libraries/libvpx/git.nix
@@ -77,6 +77,7 @@ stdenv.mkDerivation rec {
   outputs = [ "bin" "dev" "out" ];
   setOutputFlags = false;
 
+  configurePlatforms = [];
   configureFlags = [
     (enableFeature (vp8EncoderSupport || vp8DecoderSupport) "vp8")
     (enableFeature vp8EncoderSupport "vp8-encoder")
@@ -139,23 +140,7 @@ stdenv.mkDerivation rec {
     (enableFeature (experimentalSpatialSvcSupport ||
                     experimentalFpMbStatsSupport ||
                     experimentalEmulateHardwareSupport) "experimental")
-    # Experimental features
-  ] ++ optional experimentalSpatialSvcSupport "--enable-spatial-svc"
-    ++ optional experimentalFpMbStatsSupport "--enable-fp-mb-stats"
-    ++ optional experimentalEmulateHardwareSupport "--enable-emulate-hardware";
-
-  nativeBuildInputs = [ perl yasm ];
-
-  buildInputs = [ ]
-    ++ optionals unitTestsSupport [ coreutils curl ];
-
-  enableParallelBuilding = true;
-
-  postInstall = ''moveToOutput bin "$bin" '';
-
-  crossAttrs = {
-    configurePlatforms = [];
-    configureFlags = configureFlags ++ [
+  ] ++ optionals (stdenv.hostPlatform != stdenv.buildPlatform) [
       #"--extra-cflags="
       #"--prefix="
       #"--libc="
@@ -175,8 +160,19 @@ stdenv.mkDerivation rec {
                 else "8"
               else ""}-gcc"
       (if hostPlatform.isCygwin then "--enable-static-msvcrt" else "")
-    ];
-  };
+  ] # Experimental features
+    ++ optional experimentalSpatialSvcSupport "--enable-spatial-svc"
+    ++ optional experimentalFpMbStatsSupport "--enable-fp-mb-stats"
+    ++ optional experimentalEmulateHardwareSupport "--enable-emulate-hardware";
+
+  nativeBuildInputs = [ perl yasm ];
+
+  buildInputs = [ ]
+    ++ optionals unitTestsSupport [ coreutils curl ];
+
+  enableParallelBuilding = true;
+
+  postInstall = ''moveToOutput bin "$bin" '';
 
   meta = with stdenv.lib; {
     description = "WebM VP8/VP9 codec SDK";
diff --git a/pkgs/tools/networking/tcpdump/default.nix b/pkgs/tools/networking/tcpdump/default.nix
index 324a58cf7edb..59cc89ac5727 100644
--- a/pkgs/tools/networking/tcpdump/default.nix
+++ b/pkgs/tools/networking/tcpdump/default.nix
@@ -1,6 +1,4 @@
-{ stdenv, fetchurl, fetchpatch, libpcap, enableStatic ? false
-, hostPlatform
-}:
+{ stdenv, fetchurl, fetchpatch, libpcap }:
 
 stdenv.mkDerivation rec {
   name = "tcpdump-${version}";
@@ -20,11 +18,9 @@ stdenv.mkDerivation rec {
 
   buildInputs = [ libpcap ];
 
-  crossAttrs = {
-    LDFLAGS = if enableStatic then "-static" else "";
-    configureFlags = [ "ac_cv_linux_vers=2" ] ++ (stdenv.lib.optional
-      (hostPlatform.platform.kernelMajor or null == "2.4") "--disable-ipv6");
-  };
+  configureFlags = stdenv.lib.optional
+    (stdenv.hostPlatform != stdenv.buildPlatform)
+    "ac_cv_linux_vers=2";
 
   meta = {
     description = "Network sniffer";
diff --git a/pkgs/tools/text/groff/default.nix b/pkgs/tools/text/groff/default.nix
index 4495a85b2885..27581134ca34 100644
--- a/pkgs/tools/text/groff/default.nix
+++ b/pkgs/tools/text/groff/default.nix
@@ -50,15 +50,14 @@ stdenv.mkDerivation rec {
     "ac_cv_path_PERL=${buildPackages.perl}/bin/perl"
   ];
 
-  doCheck = true;
-
-  crossAttrs = {
+  makeFlags = stdenv.lib.optionals (stdenv.buildPlatform != stdenv.hostPlatform) [
     # Trick to get the build system find the proper 'native' groff
     # http://www.mail-archive.com/bug-groff@gnu.org/msg01335.html
-    preBuild = ''
-      makeFlags="GROFF_BIN_PATH=${buildPackages.groff}/bin GROFFBIN=${buildPackages.groff}/bin/groff"
-    '';
-  };
+    "GROFF_BIN_PATH=${buildPackages.groff}/bin"
+    "GROFFBIN=${buildPackages.groff}/bin/groff"
+  ];
+
+  doCheck = true;
 
   # Remove example output with (random?) colors and creation date
   # to avoid non-determinism in the output.