diff --git a/pkgs/development/interpreters/perl-5.10/default.nix b/pkgs/development/interpreters/perl-5.10/default.nix
index cb479c97be20..486bb8f54845 100644
--- a/pkgs/development/interpreters/perl-5.10/default.nix
+++ b/pkgs/development/interpreters/perl-5.10/default.nix
@@ -9,6 +9,8 @@ stdenv.mkDerivation {
     sha256 = "0bivbz15x02m02gqs6hs77cgjr2msfrhnvp5xqk359jg6w6llill";
   };
 
+  NIX_CFLAGS_COMPILE = if stdenv.system == "x86_64-linux" then "-fPIC" else "";
+
   patches = [
     # This patch does the following:
     # 1) Do use the PATH environment variable to find the `pwd' command.
diff --git a/pkgs/development/libraries/vxl/default.nix b/pkgs/development/libraries/vxl/default.nix
index 7cdb6963cd25..652c423fd7ef 100644
--- a/pkgs/development/libraries/vxl/default.nix
+++ b/pkgs/development/libraries/vxl/default.nix
@@ -9,6 +9,12 @@ stdenv.mkDerivation {
 
   buildInputs = [ cmake unzip libtiff expat zlib libpng libjpeg ];
 
+  cmakeFlags = if (stdenv.system == "x86_64-linux") then
+      "-DCMAKE_CXX_FLAGS=-fPIC -DCMAKE_C_FLAGS=-fPIC"
+    else
+      "";
+    
+
   meta = {
     description = "C++ Libraries for Computer Vision Research and Implementation";
     homepage = http://vxl.sourceforge.net/;