doctest is broken

[angerman]

When building plutus, which depends on doctest, we are greeted with the following

building '/nix/store/dsb4ms3cl8zbmiz75vhs22bzv79ycc1p-doctest-0.16.0.1-lib-doctest.drv'...
unpacking sources
unpacking source archive /nix/store/5bq470x5a3livhakypg1f366cizj5j4n-doctest-0.16.0.1.tar.gz
source root is doctest-0.16.0.1
setting SOURCE_DATE_EPOCH to timestamp 1537720725 of file doctest-0.16.0.1/test/sandbox/cabal.sandbox.config
patching sources
configuring
Configure flags:
--prefix=/nix/store/7pbi41yrc2c7cwxm3hzmwrf8i81lbgdr-doctest-0.16.0.1-lib-doctest lib:doctest --package-db=clear --package-db=/nix/store/78lh5qp3k319g6a7f43givydc89mx0hb-doctest-0.16.0.1-lib-doctest-config/package.conf.d --with-ghc=ghc --with-ghc-pkg=ghc-pkg --with-hsc2hs=hsc2hs --with-gcc=cc --with-ld=ld --with-ar=ar --with-strip=strip --enable-executable-stripping --enable-library-stripping --docdir=/nix/store/0car37r8vml0z0531l13pvwah8bf2ala-doctest-0.16.0.1-lib-doctest-doc/share/doc/doctest
Configuring library for doctest-0.16.0.1..
Loaded package environment from /nix/store/78lh5qp3k319g6a7f43givydc89mx0hb-doctest-0.16.0.1-lib-doctest-config/ghc-environment
clang-5.0: warning: argument unused during compilation: '-nopie' [-Wunused-command-line-argument]
Error:
    The following packages are broken because other packages they depend on are missing. These broken packages must be rebuilt before they can be used.
installed package ghc-8.4.4 is broken due to missing package directory-1.3.1.5, process-1.6.3.0, bytestring-0.10.8.2, binary-0.8.5.1, time-1.8.0.2, containers-0.5.11.0, filepath-1.4.2, hpc-0.6.0.3, transformers-0.5.5.0, ghc-boot-8.4.4, ghci-8.4.4, unix-2.7.2.2, terminfo-0.4.1.1

builder for '/nix/store/dsb4ms3cl8zbmiz75vhs22bzv79ycc1p-doctest-0.16.0.1-lib-doctest.drv' failed with exit code 1
cannot build derivation '/nix/store/ca251jy00nj1csx9i7f4l4c54waw3xdj-doctest-0.16.0.1-exe-doctest-config.drv': 1 dependencies couldn't be built
building '/nix/store/01kwh9lhghhf8wvvfmp1v1b1csizrkll-resourcet-1.2.2-lib-resourcet-config.drv'...
cannot build derivation '/nix/store/v94kl14rh1gx3fkyrdgn0v7bh67g2f7i-doctest-0.16.0.1-exe-doctest.drv': 1 dependencies couldn't be built

[angerman]

I believe this will be an issue for any package that depends on the ghc library.

I'm a bit puzzled because I thought we did build doctest for cardano-sl. I might be misremembering something here...

[angerman]

This was fixed with input-output-hk/iohk-nix#42