allows to write neat expressions like (as we're still generating an
expression string):
```
{
build = haskellPackages.buildLocalCabalWithArgs {
inherit src name;
cabalDrvArgs = {
jailbreak = false;
doCheck = false;
};
};
}
```
without resorting to weird kung-fu like darcs does:
```
darcs = haskellPackages.darcs.override {
# A variant of the Darcs derivation that containts only the
# executable and
# thus has no dependencies on other Haskell packages.
cabal = { mkDerivation = x: rec { final = haskellPackages.cabal.mkDerivation (self: (x final) // {
isLibrary = false;
configureFlags = "-f-library"; }); }.final;
};
};
```
While here, move the `jailbreak = true;` as the default `cabalDrvArgs`
option.
7eff825487