diff --git a/pkgs/applications/networking/instant-messengers/pidgin-plugins/sipe/default.nix b/pkgs/applications/networking/instant-messengers/pidgin-plugins/sipe/default.nix
index b387ed350af2..8b19f338d3e6 100644
--- a/pkgs/applications/networking/instant-messengers/pidgin-plugins/sipe/default.nix
+++ b/pkgs/applications/networking/instant-messengers/pidgin-plugins/sipe/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, pidgin, intltool, libxml2 }:
+{ stdenv, fetchurl, pidgin, intltool, libxml2, nss, nspr }:
 
 let version = "1.18.1"; in
 
@@ -19,5 +19,6 @@ stdenv.mkDerivation {
 
   postInstall = "find $out -ls; ln -s \$out/lib/purple-2 \$out/share/pidgin-sipe";
 
-  buildInputs = [pidgin intltool libxml2];
+  buildInputs = [ pidgin intltool libxml2 nss nspr ];
+
 }
diff --git a/pkgs/development/tools/packer/default.nix b/pkgs/development/tools/packer/default.nix
index 8b89e8ae82db..651e64467c49 100644
--- a/pkgs/development/tools/packer/default.nix
+++ b/pkgs/development/tools/packer/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, gox, fetchgit, fetchhg, fetchbzr, fetchFromGitHub }:
+{ stdenv, lib, go, gox, fetchgit, fetchhg, fetchbzr, fetchFromGitHub }:
 
 stdenv.mkDerivation rec {
   name = "packer-0.7.5";
@@ -7,7 +7,7 @@ stdenv.mkDerivation rec {
     inherit stdenv lib fetchgit fetchhg fetchbzr fetchFromGitHub;
   };
 
-  buildInputs = [ gox ];
+  buildInputs = [ go gox ];
 
   installPhase = ''
     export GOPATH=$src