[gnome-builder] flatpak: ignore runtimes on system installation

[Christian Hergert <chergert src gnome org>]

commit 710a3eb7a167e5bf86285cb94ae4b6e6d280eb56
Author: Christian Hergert <chergert redhat com>
Date:   Tue Nov 16 15:27:09 2021 -0800

    flatpak: ignore runtimes on system installation
    
    If the runtime is on the system installation, we don't want to resolve an
    installation request using that. Instead we want to fallback to either the
    user or private installation.

 src/plugins/flatpak/daemon/ipc-flatpak-service-impl.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)
---
diff --git a/src/plugins/flatpak/daemon/ipc-flatpak-service-impl.c 
b/src/plugins/flatpak/daemon/ipc-flatpak-service-impl.c
index 0b56a2d15..e5b832966 100644
--- a/src/plugins/flatpak/daemon/ipc-flatpak-service-impl.c
+++ b/src/plugins/flatpak/daemon/ipc-flatpak-service-impl.c
@@ -963,9 +963,13 @@ find_installations_for_refs (IpcFlatpakServiceImpl *self,
         {
           const Runtime *r = g_ptr_array_index (self->runtimes, j);
 
+          /* Check for matching ref, but also that installation is going
+           * to be writable to us from the sandbox.
+           */
           if (str_equal0 (name, r->name) &&
               str_equal0 (arch, r->arch) &&
-              str_equal0 (branch, r->branch))
+              str_equal0 (branch, r->branch) &&
+              flatpak_installation_get_is_user (r->installation))
             {
               g_ptr_array_add (installations, g_object_ref (r->installation));
               continue;