1.11.4 contains numerous improvements including ligatures and fixes to
font weights.
I switched "default.nix" from using `fetchFromGitHub` to simply pulling
down the release as a zip via `fetchurl`. This seems like the best
approach given that the repositoriy no longer contains font files and
the alternative would be to build them from scratch.
Split outputs because there's no point in keeping a reference to Python
and it causes trouble during the Darwin stdenv bootstrap. There's also
an unnecessary dependency on LLVM in libc++ which causes us to rebuild
LLVM several more times than necessary during bootstrap, and an awkward
dependency on XPC in the TSAN that we turn off. This is in preparation
for using LLVM 4 in the Darwin stdenv and by default across nixpkgs.
deriving Yojson is a ppx_deriving plugin that generates JSON serializers and
deserializers that use the Yojson library from an OCaml type definition.
Homepage: https://github.com/whitequark/ppx_deriving_yojson
To reproduce the issue:
```
nix-build -E 'import <nixpkgs> {}' -A python27Packages.spambayes
result/bin/sb_filter.py </dev/null
```
Before this commit, this fails with
```
[...]
File "/nix/store/vlgr1wrxd2wiw5ay5ch54365dzqvcwgq-python2.7-spambayes-1.1b1/lib/python2.7/site-packages/spambayes/dbmstorage.py", line 20, in open_dbhash
return bsddb.hashopen(*args)
AttributeError: 'NoneType' object has no attribute 'hashopen'
```
After this commit, it doesn't.