filterx: `load_vars()` #1195

Job	Run time
create-source-tarball	1m 55s
create-packages / almalinux-8	4m 15s
create-packages / almalinux-9	7m 12s
create-packages / debian-bookworm	6m 16s
create-packages / debian-testing	6m 8s
create-packages / fedora-41	7m 43s
create-packages / ubuntu-noble	9m 16s
	42m 45s

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