If set to false, mkDerivation will throw an exception if a package has
an unfree license. ‘release-lib.nix’ uses this to enforce that we
don't build unfree packages as part of the Nixpkgs channel. Since
this is set through Nixpkgs' ‘config’ argument, it's more finegrained
than $HYDRA_DISALLOW_UNFREE.
time and space on the new (non-ATerm) Nix expression evaluator. It
turns out that release.nix relied rather heavily on maximal laziness
for efficiency: every job calls `allPackages { inherit system; }'
for each platform. This causes the dependencies of the job to be
reevaluated for every job/platform combination. This is very slow
and (because the evaluator doesn't have a garbage collector yet)
eventually causes the evaluator to run out of memory and be killed.
As a workaround, I've replaced the calls to `allPackages' with a
quasi-memoised `pkgsFor' function. It "caches" the result by going
through a variable such as `pkgs_x86_64_linux', which is evaluated
only once. Evaluation now only takes 4.4s and 545 MiB on my
machine.
A cleaner solution may be to move the `system' argument outwards so
that entire set of jobs is called only once for each value of
`system'.
svn path=/nixpkgs/trunk/; revision=21966
I want to cross-build utillinux and coreutils, and that play will have to go in stdenv-updates I think.
svn path=/nixpkgs/branches/stdenv-updates/; revision=20506
