Full rebuild on test modification

[nmattia]

Not sure how to run the tests properly. So far I've been building the prop-compiled component. However it seems to imply a full rebuild every time I modify tests/Properties.hs. I suspect the reason is because prop-compiled doesn't use bytestring as a library but rather lists the source files as its own in hs-source-dirs: . tests. For some reason, some other packages (regex-base, text, ansi-wl-pprint, ...) are recompiled as well. This takes up a whole minute for every change I make in the tests. Am I missing a simple way to run them that doesn't involve compiling?

EDIT:
disclaimer (don't shoot): I'm using stack build bytestring:prop-compiled

[hvr]

Well, bytestring is a bit special as it's a package super low in the dependency graph, and this results in its testsuites running into cyclic dependency issues (i.e. text depends on the bytestring package). This is a rather long-standing finicky issue and affects mostly core packages such as bytestring which everyone else depends upon, see haskell/cabal#3824 (comment) for a recent analysis. And yes, the reason you see modules being compiled multiple times is that the testsuites don't depend upon bytestring, but rather compile their own copies.