diff --git a/pkgs/applications/virtualization/virt-viewer/default.nix b/pkgs/applications/virtualization/virt-viewer/default.nix
index 90e92a3e68d..b11016ae65d 100644
--- a/pkgs/applications/virtualization/virt-viewer/default.nix
+++ b/pkgs/applications/virtualization/virt-viewer/default.nix
@@ -1,6 +1,6 @@
 x@{builderDefsPackage
   , gnome, gtk, glib, libxml2, pkgconfig, libvirt, gtkvnc, cyrus_sasl, libtasn1
-  , gnupg, libgcrypt, perl
+  , gnupg, libgcrypt, perl, nettle
   , ...}:
 builderDefsPackage
 (a :  
diff --git a/pkgs/tools/admin/gtk-vnc/default.nix b/pkgs/tools/admin/gtk-vnc/default.nix
index 3b535dabbae..036389babe2 100644
--- a/pkgs/tools/admin/gtk-vnc/default.nix
+++ b/pkgs/tools/admin/gtk-vnc/default.nix
@@ -1,7 +1,7 @@
 x@{builderDefsPackage
   , python, gtk, pygtk, gnutls, cairo, libtool, glib, pkgconfig, libtasn1
   , libffi, cyrus_sasl, intltool, perl, perlPackages, firefox36Pkgs
-  , kbproto, libX11, libXext, xextproto, pygobject
+  , kbproto, libX11, libXext, xextproto, pygobject, libgcrypt
   , ...}:
 builderDefsPackage
 (a :