`version` doesn't include .0 patch versions, or suffixes (eg -gnu).
For .0 patch versions, this isn't a problem, since the glob takes care
of everything after a `.`. It does, however, prevent openafs installing
for suffixed kernels.
sometimes we want the "SDK" version from xcbuild so we do something
like:
$ xcbuild -version -sdk MacOSX10.10
SDKSettings.plist - MacOSX10.10 (MacOSX10.10)
SDKVersion: 10.10
Path: /nix/store/6k7crm1n4drf09ga0dwvbmb59x4zl2i2-SDKs/MacOSX10.10.sdk
PlatformPath: /nix/store/vhfwb1znfy65s2xs27j8xribk6mp6lbw-Platforms/MacOSX.platform
ProductName: Mac OS X
ProductVersion: 10.10
This was previously overriden by the current xcode version so you
would get:
Xcode 9.4.1
Build version 17E189
This should fix the other usage of -version in nodejs 6.x.
Another attempt after my sloppy https://github.com/NixOS/nixpkgs/commit/48ccdf322d9e7a68d0caf5833511ee3e53ec7d3a.
@Infinisil, thanks again, reverted in https://github.com/NixOS/nixpkgs/commit/4794aa5de233b5bf2d1c3245946379699d023467 and explained my mistakes in https://github.com/NixOS/nixpkgs/commit/48ccdf322d9e7a68d0caf5833511ee3e53ec7d3a#commitcomment-29678643. I start with their work and provide this proof of this commit's correctness:
```nix
(lib.fixedPoints.extends (lib.flip g) f) # now
((f: rattrs: self: let super = rattrs self; in super // f self super) (lib.flip g) f) # inline extends
(self: let super = f self; in super // (lib.flip g) self super) # beta reduce
(self: let super = f self; in super // g super self) # beta reduce
(self_: let super = f self_; in super // g super self_) # alpha rename
(self_: let super = f self_; in super // g super self_) # original, same
```
Eventually we might harmonize `overrideScope`'s `g` parameter with the general pattern, but I leave that breaking change as a separate step. Best not to refactor and break at once, and at least the abstractions make the oddity clearer.
José Romildo Malaquias