Hi Simon,
What is the background?
Dependency chain:
base -> regex -> other_lib
in order to use other_lib ghc must find regex and base.
Currently ghc is wrapped passing all paths found in $PATH to ghc and
ghc-pkg etc using -package-conf.
that's why ghc usually does find them on NixOS/nixpkgs.
That's why ghc-pkg does not show core packages - this should be fixed as
well (?)
So in order to use other_lib regex and base must be in PATH.
That's the reason why kind of propagated-user-env-packages should be
used.
In hack-nix I added to the cabal builder explicitly :
{
propagatedBuildNativeInputs = deps;
}
Probably that's because I never encountered this issue.
AFAIK Andres Loeh (kosmikus) is the maintainer of that code.
So without investigating any further this looks like a bug to me.
I'd wait 24h or so - maybe Andres Loeh replies.
Marc Weber
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