libpanel: fix cross compilation, enable strictDeps

[NickCao]

Description of changes

Things done

• Built on platform(s)
  • x86_64-linux
  • aarch64-linux
  • x86_64-darwin
  • aarch64-darwin
• For non-Linux: Is sandboxing enabled in nix.conf? (See Nix manual)
  • sandbox = relaxed
  • sandbox = true
• Tested, as applicable:
  • NixOS test(s) (look inside nixos/tests)
  • and/or package tests
  • or, for functions and "core" functionality, tests in lib/tests or pkgs/test
  • made sure NixOS tests are linked to the relevant packages
• Tested compilation of all packages that depend on this change using nix-shell -p nixpkgs-review --run "nixpkgs-review rev HEAD". Note: all changes have to be committed, also see nixpkgs-review usage
• Tested basic functionality of all binary files (usually in ./result/bin/)
• 24.11 Release Notes (or backporting 23.11 and 24.05 Release notes)
  • (Package updates) Added a release notes entry if the change is major or breaking
  • (Module updates) Added a release notes entry if the change is significant
  • (Module addition) Added a release notes entry if adding a new NixOS module
• Fits CONTRIBUTING.md.

---

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[NickCao]

Result of nixpkgs-review pr 333563 run on x86_64-linux 1

87 packages built:

• adapta-gtk-theme
• budgie-analogue-clock-applet
• budgie-control-center
• budgie-control-center.debug
• budgie-desktop
• budgie-desktop-with-plugins
• budgie-desktop.dev
• budgie-desktop.man
• budgie-gsettings-overrides
• budgie-user-indicator-redux
• fm
• gnome-browser-connector
• gnome-builder
• gnome-builder.devdoc
• gnome-tweaks
• gnome.gnome-control-center
• gnome.gnome-control-center.debug
• gnome.gnome-session
• gnome.gnome-session.debug
• gnome.gnome-session.sessions
• gnome.gnome-shell
• gnome.gnome-shell.debug
• gnome.gnome-shell.devdoc
• gnome.mutter
• gnome.mutter.debug
• gnome.mutter.dev
• gnome.mutter.devdoc
• gnome.mutter.man
• gnome.mutter43
• gnome.mutter43.debug
• gnome.mutter43.dev
• gnome.mutter43.devdoc
• gnome.mutter43.man
• gnome.nixos-gsettings-overrides
• gnomeExtensions.easyScreenCast
• gnomeExtensions.gsconnect
• gnomeExtensions.gsconnect.installedTests
• libpanel
• libpanel.dev
• libpanel.devdoc
• magpie
• magpie.debug
• magpie.dev
• magpie.devdoc
• matrix-gtk-theme
• mojave-gtk-theme
• monitor
• nightfox-gtk-theme
• pantheon.elementary-greeter
• pantheon.elementary-gsettings-schemas
• pantheon.elementary-session-settings
• pantheon.elementary-shortcut-overlay
• pantheon.gala
• pantheon.switchboard-plug-a11y
• pantheon.switchboard-plug-bluetooth
• pantheon.switchboard-plug-mouse-touchpad
• pantheon.switchboard-plug-pantheon-shell
• pantheon.switchboard-plug-power
• pantheon.switchboard-plug-security-privacy
• pantheon.switchboard-with-plugs
• pantheon.wingpanel
• pantheon.wingpanel-applications-menu
• pantheon.wingpanel-indicator-a11y
• pantheon.wingpanel-indicator-bluetooth
• pantheon.wingpanel-indicator-datetime
• pantheon.wingpanel-indicator-keyboard
• pantheon.wingpanel-indicator-network
• pantheon.wingpanel-indicator-nightlight
• pantheon.wingpanel-indicator-notifications
• pantheon.wingpanel-indicator-power
• pantheon.wingpanel-indicator-session
• pantheon.wingpanel-indicator-sound
• pantheon.wingpanel-with-indicators
• phoc
• phosh
• phosh-mobile-settings
• pods
• schemes
• sysprof
• sysprof.dev
• sysprof.lib
• tokyonight-gtk-theme
• vala-language-server
• vimix-gtk-themes
• whitesur-gtk-theme
• wingpanel-indicator-ayatana
• zrythm

[jtojnar]

Thanks, LGTM.