diff --git a/pkgs/tools/admin/gtk-vnc/default.nix b/pkgs/tools/admin/gtk-vnc/default.nix
index 2201020c159e..37a27127bab0 100644
--- a/pkgs/tools/admin/gtk-vnc/default.nix
+++ b/pkgs/tools/admin/gtk-vnc/default.nix
@@ -16,6 +16,8 @@
 , gettext
 , perl
 , gnome3
+, gdk-pixbuf
+, zlib
 }:
 
 stdenv.mkDerivation rec {
@@ -30,6 +32,7 @@ stdenv.mkDerivation rec {
   };
 
   patches = [
+    # Fix undeclared gio-unix-2.0 in example program.
     (fetchpatch {
       url = "https://gitlab.gnome.org/GNOME/gtk-vnc/commit/8588bc1c8321152ddc5086ca9b2c03a7f511e0d0.patch";
       sha256 = "0i1iapsbngl1mhnz22dd73mnzk68qc4n51pqdhnm18zqc8pawvh4";
@@ -49,6 +52,8 @@ stdenv.mkDerivation rec {
   buildInputs = [
     gnutls
     cairo
+    gdk-pixbuf
+    zlib
     glib
     libgcrypt
     cyrus_sasl
@@ -58,7 +63,7 @@ stdenv.mkDerivation rec {
 
   passthru = {
     updateScript = gnome3.updateScript {
-      packageName = "gtk-vnc";
+      packageName = pname;
       versionPolicy = "none";
     };
   };