Nixpkgs: Hydra build broken on master and 18.03

[srhb]

Issue description

https://hydra.nixos.org/job/nixos/release-18.03/nixpkgs.hydra.x86_64-linux

Possibly a missing propagatedBuildInputs on boost?

Possibly related to: https://github.com/NixOS/nix/issues/1975

In file included from /nix/store/8hkymyx0gycwg23qibbyl7n410gxabf9-nix-2.0pre6137_e3cdcf89-dev/include/nix/derivations.hh:3:0,
                 from lib/Nix/Store.xs:11:
/nix/store/8hkymyx0gycwg23qibbyl7n410gxabf9-nix-2.0pre6137_e3cdcf89-dev/include/nix/types.hh:12:10: fatal error: boost/format.hpp: No such file or directory
 #include <boost/format.hpp>
          ^~~~~~~~~~~~~~~~~~
compilation terminated.
make: *** [mk/patterns.mk:3: lib/Nix/Store.o] Error 1
builder for '/nix/store/jzynkmchp1jf2j95q6lc5jmxldcx3jnf-nix-perl-2.0pre6137_e3cdcf89.drv' failed with exit code 2
cannot build derivation '/nix/store/a4z1c9agcliwjkr4xkq4wq8n0kb1wzx4-hydra-perl-deps.drv': 1 dependencies couldn't be built
cannot build derivation '/nix/store/9qms3966b6swqpyh1p1w76psachz41q0-hydra-2017-11-21.drv': 1 dependencies couldn't be built
error: build of '/nix/store/9qms3966b6swqpyh1p1w76psachz41q0-hydra-2017-11-21.drv' failed

Steps to reproduce

nix-build '<nixpkgs>' -A hydra

Technical details

nixpkgs commit 41b1c57d8dd7a6791e90877e9d151fc9994318a1

[srhb]

/cc @domenkozar

[srhb]

Or maybe Hydra should just not use nixUnstable and its perl bindings, but nix.

[domenkozar]

Yeah, sounds like perl bindings needs (correct?) boost.

[erictapen]

I can not offer a fix, but a temporarily workaround: Reverting 8667719f3040b645067a20d9027ebca6977339fb apparently fixed this for me.

[srhb]

@erictapen A cleaner workaround (and possibly the real fix) is to add boost to the propagatedBuildInputs of Nix itself.

Not sure which direction to take with this, though.

[shlevy]

The problem with boost in propagatedBuildInputs is that we really only need/want the headers. In any case, hydra should be using nix, not nixUnstable. I'll fix that.

[shlevy]

And now nixUnstable.perl-bindings works as well.

[dhess]

Since this change, I get an error trying to start hydra-server. From the log of a test:

hydra# [   38.522286] hydra-server[1020]: Can't locate CatalystX/RoleApplicator.pm in @INC (you may need to install the CatalystX::RoleApplicator module) (@INC contains: /nix/store/yfhzsc7lpizxb76d9300sy9jawakk5j3-hydra-2017-11-21/libexec/hydra/lib /nix/store/9a33c872rlgda3zqf4x05izyl5jv2hr6-hydra-perl-deps/lib/perl5/site_perl/5.24.3/x86_64-linux-thread-multi /nix/store/9a33c872rlgda3zqf4x05izyl5jv2hr6-hydra-perl-deps/lib/perl5/site_perl/5.24.3 /nix/store/9a33c872rlgda3zqf4x05izyl5jv2hr6-hydra-perl-deps/lib/perl5/site_perl /nix/store/cxdmh98g0lvl1dyq304c1lq7f90dh01f-perl-5.24.3/lib/perl5/site_perl/5.24.3/x86_64-linux-thread-multi /nix/store/cxdmh98g0lvl1dyq304c1lq7f90dh01f-perl-5.24.3/lib/perl5/site_perl/5.24.3 /nix/store/cxdmh98g0lvl1dyq304c1lq7f90dh01f-perl-5.24.3/lib/perl5/site_perl /nix/store/cxdmh98g0lvl1dyq304c1lq7f90dh01f-perl-5.24.3/lib/perl5/5.24.3/x86_64-linux-thread-multi /nix/store/cxdmh98g0lvl1dyq304c1lq7f90dh01f-perl-5.24.3/lib/perl5/5.24.3 .) at /nix/store/yfhzsc7lpizxb76d9300sy9jawakk5j3-hydra-2017-11-21/libexec/hydra/lib/Hydra.pm line 22.
hydra# [   38.542486] hydra-server[1020]: BEGIN failed--compilation aborted at /nix/store/yfhzsc7lpizxb76d9300sy9jawakk5j3-hydra-2017-11-21/libexec/hydra/lib/Hydra.pm line 22.
hydra# [   38.548678] hydra-server[1020]: Compilation failed in require at /nix/store/9a33c872rlgda3zqf4x05izyl5jv2hr6-hydra-perl-deps/lib/perl5/site_perl/5.24.3/Catalyst/Utils.pm line 309.
hydra# [   38.555978] systemd[1]: hydra-server.service: Main process exited, code=exited, status=2/INVALIDARGUMENT
hydra# [   38.558857] systemd[1]: hydra-server.service: Failed with result 'exit-code'.

edit: It's not quite that simple. I get the same error using the parent commit and adding boost to Nix's propagatedBuildInputs. I'm not sure where this is coming from, but it was introduced since b239b00c4871be44e8d52d72bb2de9ceb27e8c64

edit 2: Sorry for the noise, my issue was unrelated to this one. I've created a PR for it in #39314.