cabal-log.hs

$ cabal v2-install vty
Wrote tarball sdist to
/home/farzeen/Projects/CHIP8_Haskell/dist-newstyle/sdist/CHIP8-Haskell-0.1.0.0.tar.gz
Resolving dependencies...
Build profile: -w ghc-8.6.5 -O1
In order, the following will be built (use -v for more details):
 - microlens-mtl-0.2.0.1 (lib) (requires build)
 - vty-5.26 (lib) (requires build)
 - vty-5.26 (exe:vty-demo) (requires build)
 - vty-5.26 (exe:vty-mode-demo) (requires build)
Starting     microlens-mtl-0.2.0.1 (lib)
Building     microlens-mtl-0.2.0.1 (lib)
Symlinking vty-mode-demo
Symlinking vty-demo

Failed to build microlens-mtl-0.2.0.1.
Build log (
/home/farzeen/.cabal/logs/ghc-8.6.5/microlens-mtl-0.2.0.1-7f417dfce27f756c385800304bd46c1af81b501ab82fcb967eadb910dc2a13ca.log
):
Configuring library for microlens-mtl-0.2.0.1..
Preprocessing library for microlens-mtl-0.2.0.1..
Building library for microlens-mtl-0.2.0.1..
[1 of 2] Compiling Lens.Micro.Mtl.Internal ( src/Lens/Micro/Mtl/Internal.hs, dist/build/Lens/Micro/Mtl/Internal.o )

src/Lens/Micro/Mtl/Internal.hs:68:1: error:
    Could not find module ‘Lens.Micro’
    There are files missing in the ‘microlens-0.4.11.2’ package,
    try running 'ghc-pkg check'.
    Use -v to see a list of the files searched for.
   |
68 | import Lens.Micro
   | ^^^^^^^^^^^^^^^^^

src/Lens/Micro/Mtl/Internal.hs:69:1: error:
    Could not find module ‘Lens.Micro.Internal’
    There are files missing in the ‘microlens-0.4.11.2’ package,
    try running 'ghc-pkg check'.
    Use -v to see a list of the files searched for.
   |
69 | import Lens.Micro.Internal
   | ^^^^^^^^^^^^^^^^^^^^^^^^^^
cabal: Failed to build microlens-mtl-0.2.0.1 (which is required by
exe:vty-demo from vty-5.26 and exe:vty-mode-demo from vty-5.26). See the build
log above for details.

Here's what happens when trying to install microlens:

$ cabal v2-install microlens
Wrote tarball sdist to
/home/farzeen/Projects/CHIP8_Haskell/dist-newstyle/sdist/CHIP8-Haskell-0.1.0.0.tar.gz
Resolving dependencies...
Up to date