The motivation for inputsFrom is to create a shell environment that is suitable for development of the packages listed in inputsFrom. This commit filters out any dependencies from one package in inputsFrom to another when computing the shell environment's inputs. This supports the use case where several closely related packages (perhaps even built from the same source tree) are being mutually developed. It is assumed that the user will configure their environment to resolve dependencies between these mutually developed packages.
This function is fundamentally broken.
Not even the ncurses example will compile.
The interface needs to be rethought for it to work (i.e. don't
unconditionally include all pc files, set include path and ld path and
rpath).
Since it is unlikely that in the current this has any user, just drop it for now.
dyld: lazy symbol binding failed: Symbol not found: _dsyevd_
Referenced from: /nix/store/lr8grz1knmh6vc7j830gni0ka68qf1lk-xfitter-2.0.1/bin/xfitter
Expected in: /System/Library/Frameworks/Accelerate.framework/Versions/A/Frameworks/vecLib.framework/Versions/A/libBLAS.dylib
Fixes https://github.com/dhall-lang/dhall-haskell/issues/2267
`pkgs.dhallToNix` currently fails when a Dhall package is
interpolated into the input source code, like this:
```nix
let
pkgs = import <nixpkgs> { };
f = { buildDhallPackage }: buildDhallPackage {
name = "not";
code = "λ(x : Bool) → x == False";
source = true;
};
not = pkgs.dhallPackages.callPackage f {};
in
pkgs.dhallToNix "${not}/source.dhall True"
```
This is because `dhallToNix` was using `builtins.toFile`, which
does not permit inputs with interpolated derivations. However,
`pkgs.writeText` does not have this limitation, so we can switch
to using that instead.
Apparently, a non-existent nsswitch.conf causes a very misleading host
resolution, differing from the defaults people are used to.
According to
https://github.com/golang/go/issues/22846#issuecomment-346377144, glibc
says the default is "dns [!UNAVAIL=return] files".
This means, `/etc/hosts` isn't really honored, causing all sorts of
unexpected behaviour.
Let's prevent this, and first ask `/etc/hosts` before querying DNS, like
we do on NixOS too.
