We currently do not build mathplotlib with any backend. This can be very
confusing for users. They will try to use matplotlib and it will simply
display nothing (see #51337). We should ship at least one backend. `tk`
was chosen somewhat arbitrarily. The gtk backend is problematic (see
NixOS/nixpkgs#50959 (comment))
so tkinter seems like a good choice.

There is already a backend provided on darwin so there is no reason to
include tk there.

NixOS 19.03 has hunspell 1.7.0 which is incompatible with emacs 26.1.
This issue has been fixed in upstream and we should drop this patch
after emacs is updated too.

https://gitlab.com/cmocka/cmocka/tags/cmocka-1.1.5
slightly more descriptive note about the release
on https://cmocka.org but not easy to link.

clblas does not work anymore with gmock 1.8.1.
Turning off the test suite fixes the build.

move cmake into nativeBuildInputs

Signed-off-by: Matthias Beyer <mail@beyermatthias.de>
Suggested-by: Profpatsch <mail@profpatsch.de>

* Changing leaveDotGit to git chacha on build

* Removing debugging cruft

* Simpler git handling

* Can't clobber index after `add`

* Update pkgs/development/ruby-modules/gem/default.nix

Useful comments

Co-Authored-By: nyarly <nyarly@users.noreply.github.com>

* Update pkgs/development/ruby-modules/gem/default.nix

Comments are useful

Co-Authored-By: nyarly <nyarly@users.noreply.github.com>

libmodbus: fix for cross compilation

emacs: backport hunspell 1.7.0 support from upstream

lib: lists: Alias map = builtins.map

assaultcube: unstable-2017-05-01 -> unstable-2018-05-20

cmocka: 1.1.3 -> 1.1.5

pythonPackages.minio: init at 4.0.11

clblas: turn of gtest, fix build

pythonPackages.matplotlib: enable tk backend by default