In preparation for the deprecation of `stdenv.isX`.
These shorthands are not conducive to cross-compilation because they
hide the platforms.
Darwin might get cross-compilation for which the continued usage of `stdenv.isDarwin` will get in the way
One example of why this is bad and especially affects compiler packages
https://www.github.com/NixOS/nixpkgs/pull/343059
There are too many files to go through manually but a treewide should
get users thinking when they see a `hostPlatform.isX` in a place where it
doesn't make sense.
```
fd --type f "\.nix" | xargs sd --fixed-strings "stdenv.is" "stdenv.hostPlatform.is"
fd --type f "\.nix" | xargs sd --fixed-strings "stdenv'.is" "stdenv'.hostPlatform.is"
fd --type f "\.nix" | xargs sd --fixed-strings "clangStdenv.is" "clangStdenv.hostPlatform.is"
fd --type f "\.nix" | xargs sd --fixed-strings "gccStdenv.is" "gccStdenv.hostPlatform.is"
fd --type f "\.nix" | xargs sd --fixed-strings "stdenvNoCC.is" "stdenvNoCC.hostPlatform.is"
fd --type f "\.nix" | xargs sd --fixed-strings "inherit (stdenv) is" "inherit (stdenv.hostPlatform) is"
fd --type f "\.nix" | xargs sd --fixed-strings "buildStdenv.is" "buildStdenv.hostPlatform.is"
fd --type f "\.nix" | xargs sd --fixed-strings "effectiveStdenv.is" "effectiveStdenv.hostPlatform.is"
fd --type f "\.nix" | xargs sd --fixed-strings "originalStdenv.is" "originalStdenv.hostPlatform.is"
```
Using `--set` obscures the user's `PATH`, which
`lilypond-invoke-editor` depends on. The problem can be reproduced by
setting the `LYEDITOR` environment variable before executing
`lilypond-invoke-editor`.
The `src.meta` attribute does not exist, and even if it did the derivation does
not have a `rec` to reference it. This appears to be breaking all ofBorg meta
evaluation checks:
```
while evaluating the attribute 'homepage' at /var/lib/ofborg/checkout/repo/38dca4e3aa6bca43ea96d2fcc04e8229/mr-est/eval-0-gleber.ewr1.nix.ci/pkgs/misc/lilypond/fonts.nix:34:27:
undefined variable 'src' at /var/lib/ofborg/checkout/repo/38dca4e3aa6bca43ea96d2fcc04e8229/mr-est/eval-0-gleber.ewr1.nix.ci/pkgs/misc/lilypond/fonts.nix:34:18
```
https://gist.github.com/GrahamcOfBorg/cd87009bfee1a9c0d4f0d828b82ee09a
Fixes#10290. Lilypond finds its Guile libraries by looking at the path
in argv[0], so it should be hardcoded to the real absolute path to the
executable.
source regions which are substituded by the tool nix-repository-manager.
See http://github.com/MarcWeber/nix-repository-manager/raw/master/README.
sourceByName is called sourceFromHead now.
updates: MPlayerTrunk, haxe, neko, netsurf, cinelerra, ctags
cinelerra does no longer build due to Xorg update
svn path=/nixpkgs/trunk/; revision=18894
