Overriding libssh2 Haskell library
Overriding the package with packages.libssh2.source = "0.2.0.9" results in infinite recursion.
Possibly having to do with cabal2nix not understanding that libssh2 in pkgconfig-depends of libssh2.cabal is not self-referential.
Use the following Package Settings configuration to override libssh2:
# In `haskellProjects.default`
{
settings = {
libssh2 = {
broken = false;
custom = (p: p.overrideAttrs (oa: rec {
version = "0.2.0.9";
src = pkgs.fetchzip {
url = "mirror://hackage/${oa.pname}-${version}/${oa.pname}-${version}.tar.gz";
sha256 = "sha256-/zzj11iOxkpEsKVwB4+IF8dNZwEuwUlgw+cZYguN8QI=";
};
}));
};
};
}