virt-viewer: fix missing schema error

Fixes this error, as seen when trying to open a guest VM when
virt-viewer is accessed over ssh with X forwarding:

  GLib-GIO-ERROR **: Settings schema 'org.gnome.system.proxy' is not installed

A similar issue was fixed for virt-manager in commit
fb8a2b3be7f86481904636721f7fec99c30df389 ("virt-manager: fix missing
schema error")

1 files changed, 8 insertions, 1 deletions

diff --git a/pkgs/applications/virtualization/virt-viewer/default.nix b/pkgs/applications/virtualization/virt-viewer/default.nix
index af1bd6533a9..842687cfdaf 100644
--- a/pkgs/applications/virtualization/virt-viewer/default.nix
+++ b/pkgs/applications/virtualization/virt-viewer/default.nix
@@ -1,5 +1,6 @@
 { stdenv, fetchurl, pkgconfig, intltool, glib, libxml2, gtk3, gtkvnc, gmp
 , libgcrypt, gnupg, cyrus_sasl, shared_mime_info, libvirt, libcap_ng, yajl
+, gsettings_desktop_schemas, makeWrapper
 , spiceSupport ? true, spice_gtk ? null, spice_protocol ? null, libcap ? null, gdbm ? null
 }:
 
@@ -26,9 +27,15 @@ stdenv.mkDerivation  {
 
   buildInputs = [ 
     pkgconfig intltool glib libxml2 gtk3 gtkvnc gmp libgcrypt gnupg cyrus_sasl
-    shared_mime_info libvirt libcap_ng yajl
+    shared_mime_info libvirt libcap_ng yajl gsettings_desktop_schemas makeWrapper
   ] ++ optionals spiceSupport [ spice_gtk spice_protocol libcap gdbm ];
 
+  postInstall = ''
+    for f in "$out"/bin/*; do
+        wrapProgram "$f" --prefix XDG_DATA_DIRS : "$GSETTINGS_SCHEMAS_PATH"
+    done
+  '';
+
   meta = {
     description = "A viewer for remote virtual machines";
     maintainers = [ maintainers.raskin ];