Instead of setting sandbox environment variable PKG_CONFIG_PATH we could use meson's --pkg-config-path option. This will simplify flatpak setup script and should work in any environment.
Pull request: https://github.com/WebKit/WebKit/pull/5484
Committed 255671@main (aa8e922ba6cf): <https://commits.webkit.org/255671@main> Reviewed commits have been landed. Closing PR #5484 and removing active labels.