@thomastjeffery, thanks for your PR! By analyzing the history of the files in this pull request, we identified @sternenseemann, @rasendubi and @brandonedens to be potential reviewers.

I get error:

source root is libhttpseverywhere-0.2.3
setting SOURCE_DATE_EPOCH to timestamp 1477361792 of file libhttpseverywhere-0.2.3/test/main.vala
patching sources
configuring
100 256 100 256 0 0 605 0 --:--:-- --:--:-- --:--:-- 606

/nix/store/nmzimmm6awzjl8czr17c8fmrdikhw0ma-stdenv/setup: line 884: meson.py: command not found
builder for ‘/nix/store/pqs3sh2fjmllv4v7748zwlwwwyns38xp-libhttpseverywhere-0.2.3.drv’ failed with exit code 127
error: build of ‘/nix/store/pqs3sh2fjmllv4v7748zwlwwwyns38xp-libhttpseverywhere-0.2.3.drv’ failed
The invocation of "nix-build -A libhttpseverywhere -A meson -A pitivi /home/ndowens/.nox/nixpkgs" failed

Looks like there is an issue in libhttpseverywhere/default.nix

meson.py --prefix "$out" ..

First "meson.py" needs to be changed to "meson". After that I see that meson-0.39.0 does not let you use absolute paths. How can we get a relative path from $out?

hmm weird, nix-build -A meson works w/o error just not nox-review

May be fine after all, maybe someone else can verify this

Upgrading meson worked without issue, but it broke the build script for libhttpseverywhere.

For some reason, I get this error when running

nix-build -A meson -A libhttpseverywhere

Meson encountered an error in file meson.build, line 56, column 0:
Tried to form an absolute path to a source dir. You should not do that but use
relative paths instead.

To get include path to any directory relative to the current dir do

incdir = include_directories(dirname)

After this incdir will contain both the current source dir as well as the
corresponding build dir. It can then be used in any subdirectory and
Meson will take care of all the busywork to make paths work.

Dirname can even be '.' to mark the current directory. Though you should
remember that the current source and build directories are always
put in the include directories by default so you only need to do
include_directories('.') if you intend to use the result in a
different subdirectory.

I'm not sure how to fix this without changing the downloaded meson.build explicitly.

Looks like libhttpseverywhere needs to be updated too

True. Unfortunately that doesn't solve the problem either.

If you do want to update libhttpseverywhere, change

minor = "3";

to

minor = "10";

and the sha256 to

sha256 = "235f5b7f96188d800470871774e31696fbde085b63f65bd71434af8e9e6ac8aa";

Opening PR for the update for libhttpseverywhere #23728

I ran

nix-env -f . -iA meson

to install meson. Now how do I uninstall it?
It doesn't seem to be listed by

nix-env -q

EDIT: It was masquerading as python3.5-meson

nix-env -e meson maybe

Does this still give error for you now?

Updated libhttpseverywhere #24255 hoping this fixes this build issue

@thomastjeffery master now has 0.40, is it OK to close this?

Looks good. Thanks for the update.

It's not even me who did the update, I was just triaging these two days