v2 moved pkgx's bin location. let's make brewkit smarter #329

Job	Run time
unit-tests	24s
unavailable	16s
local-edit-tests	1m 25s
toolchain.com (linux)	1m 38s
git-clone.com (linux)	1m 40s
stark.com/foo@1.2.3 (linux)	1m 38s
fixups.org (linux)	1m 30s
stark.com/foo (linux)	1m 39s
pyapp.com/pip (mac)	49s
version-transformer.com (mac)	28s
stark.com/foo@1.2.3 (mac)	37s
pc-cmake.com (mac)	24s
toolchain.com (mac)	35s
version-transformer.com (linux)	1m 30s
fix-machos.com (mac)	30s
stark.com/foo (mac)	34s
pyapp.com/poetry (linux)	2m 22s
pyapp.com/poetry (mac)	42s
fix-machos.com (linux)	1m 37s
git-clone.com (mac)	34s
fixups.org (mac)	26s
pyapp.com/pip (linux)	1m 55s
pc-cmake.com (linux)	1m 29s
	24m 42s

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