`ghc-pkg list` tells us everything hackage2nix needs to know. In the
past the core-packages list and compiler setting in hackage2nix was
maintained manually which inevitably leads to it being forgot once in a
while – this will then mess with flag resolution when generating the
package set in some cases. Luckily, we can just let a simple derivation
do this for us.
Resolves#202621.
cust0dian is now known on github as cust0dian-old.
davsanchez is now known on github as DavSanchez.
luxferresum is now known on github as luxzeitlos.
benesim is now known on github as BeneSim.
DPDmancul has no github handle
maxwell-lt is now known on github as Maxwell-lt.
paddygord is now known on github as avaunit02.
ewok is now known on github as ewok-old.
nrhelmi is now known on github as NRHelmi.
elnudev is now known on github as ElnuDev.
jkarlson is now known on github as ethorsoe.
Zebreus is now known on github as zebreus.
vtrf is now known on github as ratsclub.
loveisgrief has no github handle
sno2wman is now known on github as SnO2WMaN.
kidsan is now known on github as Kidsan.
harrisonthorne is now known on github as muni-corn.
teozkr is now known on github as nightkr.
0xb10c is now known on github as 0xB10C.
NekomimiScience is now known on github as ScarletHg.
tonyshkurenko is now known on github as antonshkurenko.
notbandali is now known on github as bandali0.
Shrimpram is now known on github as shrimpram.
munksgaard is now known on github as Munksgaard.
MonAaraj is now known on github as ribosomerocker.
uthar is now known on github as Uthar.
Since we now have a versioned configuration-ghc-*.nix file for GHC HEAD,
we don't need to add a super special case to the package set logic in
test-configurations.nix anymore. We can just create a versioned
attribute for the ghcHEAD package set (which is not exposed) and keep
using the normal discovery logic.
The only tricky bit is that GHC HEAD's configuration file is named after
the GHC release that will be branched off from it, so a little bit of
arithmetic is involved.
