$ git rev-parse HEAD # commit from this PR
195cd3297f2d1afbb89cca6cefc8e73cb3acf6a4
$ nix-build -A haskellPackages.morte --arg config '{allowBroken=true;}'
these derivations will be built:
  /nix/store/kay0q9wh6zfxlkpqydz8r9fyma3ak807-morte-1.7.2.drv
building '/nix/store/kay0q9wh6zfxlkpqydz8r9fyma3ak807-morte-1.7.2.drv'...
setupCompilerEnvironmentPhase
Build with /nix/store/w30rhw13ji6vkv0zksms5h7897cxvl90-ghc-8.8.4.
unpacking sources
unpacking source archive /nix/store/48qw8rlx8hj1agkq8xcw2gd6virs289j-morte-1.7.2.tar.gz
source root is morte-1.7.2
setting SOURCE_DATE_EPOCH to timestamp 1572822742 of file morte-1.7.2/test/src/example9.mt
patching sources
compileBuildDriverPhase
setupCompileFlags: -package-db=/build/setup-package.conf.d -j8 +RTS -A64M -RTS -threaded -rtsopts
[1 of 1] Compiling Main             ( Setup.hs, /build/Main.o )
Linking Setup ...
configuring
configureFlags: --verbose --prefix=/nix/store/ymsxdp1lpaymgzys238qq96mkczcig7b-morte-1.7.2 --libdir=$prefix/lib/$compiler --libsubdir=$abi/$libname --datadir=/nix/store/gqccm851xl308p10llnc9zdnswjmzclq-morte-1.7.2-data/share/ghc-8.8.4 --docdir=/nix/store/2ny24f47y6q3fr4p12yfdygx4pdn8rj1-morte-1.7.2-doc/share/doc/morte-1.7.2 --with-gcc=gcc --package-db=/build/package.conf.d --ghc-options=-j8 +RTS -A64M -RTS --disable-split-objs --enable-library-profiling --profiling-detail=exported-functions --disable-profiling --enable-shared --disable-coverage --enable-static --disable-executable-dynamic --enable-tests --disable-benchmarks --enable-library-vanilla --disable-library-for-ghci --ghc-option=-split-sections --extra-lib-dirs=/nix/store/pk73wc0x32y2bmbiqiddb084w398ab6y-ncurses-6.2/lib --extra-lib-dirs=/nix/store/s0mblhs5vmjza9dmipn74rwqflxy1fw7-libffi-3.3/lib --extra-lib-dirs=/nix/store/fphpbj8jpyibz0l2xspidg6s7zm7xyb5-gmp-6.2.0/lib
Using Parsec parser
Configuring morte-1.7.2...
CallStack (from HasCallStack):
  die', called at libraries/Cabal/Cabal/Distribution/Simple/Configure.hs:1022:20 in Cabal-3.0.1.0:Distribution.Simple.Configure
  configureFinalizedPackage, called at libraries/Cabal/Cabal/Distribution/Simple/Configure.hs:475:12 in Cabal-3.0.1.0:Distribution.Simple.Configure
  configure, called at libraries/Cabal/Cabal/Distribution/Simple.hs:625:20 in Cabal-3.0.1.0:Distribution.Simple
  confHook, called at libraries/Cabal/Cabal/Distribution/Simple/UserHooks.hs:65:5 in Cabal-3.0.1.0:Distribution.Simple.UserHooks
  configureAction, called at libraries/Cabal/Cabal/Distribution/Simple.hs:180:19 in Cabal-3.0.1.0:Distribution.Simple
  defaultMainHelper, called at libraries/Cabal/Cabal/Distribution/Simple.hs:116:27 in Cabal-3.0.1.0:Distribution.Simple
  defaultMain, called at Setup.hs:2:8 in main:Main
Setup: Encountered missing or private dependencies:
microlens-mtl >=0.1.3.1 && <0.2, optparse-applicative <0.15

builder for '/nix/store/kay0q9wh6zfxlkpqydz8r9fyma3ak807-morte-1.7.2.drv' failed with exit code 1
error: build of '/nix/store/kay0q9wh6zfxlkpqydz8r9fyma3ak807-morte-1.7.2.drv' failed