these 3 derivations will be built:
  /nix/store/fjaiwxmjbw4d3wg37dh4q396zdxzfrgz-helium-appimage-0.21.1.1-fhsenv-rootfs.drv
  /nix/store/aibr804xzsiivqkxx276j8hqmvd9k8k2-helium-appimage-0.21.1.1-bwrap.drv
  /nix/store/ka1kzz3y6zkk9n80lzlnh7vs122mn90h-helium-appimage-0.21.1.1.drv
building '/nix/store/fjaiwxmjbw4d3wg37dh4q396zdxzfrgz-helium-appimage-0.21.1.1-fhsenv-rootfs.drv'
helium-appimage-0.21.1.1-fhsenv-rootfs> structuredAttrs is enabled
helium-appimage-0.21.1.1-fhsenv-rootfs> Warning: Schema ?org.gnome.system.locale? has path ?/system/locale/?.  Paths starting with ?/apps/?, ?/desktop/? or ?/system/? are deprecated.
helium-appimage-0.21.1.1-fhsenv-rootfs> Warning: Schema ?org.gnome.system.proxy? has path ?/system/proxy/?.  Paths starting with ?/apps/?, ?/desktop/? or ?/system/? are deprecated.
helium-appimage-0.21.1.1-fhsenv-rootfs> Warning: Schema ?org.gnome.system.proxy.http? has path ?/system/proxy/http/?.  Paths starting with ?/apps/?, ?/desktop/? or ?/system/? are deprecated.
helium-appimage-0.21.1.1-fhsenv-rootfs> Warning: Schema ?org.gnome.system.proxy.https? has path ?/system/proxy/https/?.  Paths starting with ?/apps/?, ?/desktop/? or ?/system/? are deprecated.
helium-appimage-0.21.1.1-fhsenv-rootfs> Warning: Schema ?org.gnome.system.proxy.ftp? has path ?/system/proxy/ftp/?.  Paths starting with ?/apps/?, ?/desktop/? or ?/system/? are deprecated.
helium-appimage-0.21.1.1-fhsenv-rootfs> Warning: Schema ?org.gnome.system.proxy.socks? has path ?/system/proxy/socks/?.  Paths starting with ?/apps/?, ?/desktop/? or ?/system/? are deprecated.
building '/nix/store/aibr804xzsiivqkxx276j8hqmvd9k8k2-helium-appimage-0.21.1.1-bwrap.drv'
helium-appimage-0.21.1.1-bwrap> structuredAttrs is enabled
building '/nix/store/ka1kzz3y6zkk9n80lzlnh7vs122mn90h-helium-appimage-0.21.1.1.drv'
helium-appimage-0.21.1.1> structuredAttrs is enabled