New comment by waynevanson on void-packages repository

https://github.com/void-linux/void-packages/pull/24723#issuecomment-715651518

Comment:
Here is the error I'm getting. It looks like it's in the Spago codebase and even comes with a suggested solution.

[14 of 29] Compiling Spago.GlobalCache

/builddir/spago-0.16.0/src/Spago/GlobalCache.hs:153:3: error:
    • Could not deduce (MonadThrow m)
        arising from a use of ‘assertDirectory’
      from the context: (MonadIO m, HasLogFunc env, MonadReader env m)
        bound by the type signature for:
                   getGlobalCacheDir :: forall (m :: * -> *) env.
                                        (MonadIO m, HasLogFunc env, MonadReader env m) =>
                                        m FilePath.FilePath
        at src/Spago/GlobalCache.hs:150:1-90
      Possible fix:
        add (MonadThrow m) to the context of
          the type signature for:
            getGlobalCacheDir :: forall (m :: * -> *) env.
                                 (MonadIO m, HasLogFunc env, MonadReader env m) =>
                                 m FilePath.FilePath
    • In a stmt of a 'do' block: _ <- assertDirectory globalCache
      In the expression:
        do globalCache <- liftIO
                            $ getXdgDirectory XdgCache "spago" <|> pure ".spago-global-cache"
           assertDirectory globalCache
           return globalCache
      In an equation for ‘getGlobalCacheDir’:
          getGlobalCacheDir
            = do globalCache <- liftIO
                                  $ getXdgDirectory XdgCache "spago" <|> pure ".spago-global-cache"
                 assertDirectory globalCache
                 return globalCache
    |
153 |   assertDirectory globalCache
    |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^
Completed 180 action(s).

--  While building package spago-0.15.3 (scroll up to its section to see the error) using:
      /builddir/spago-0.16.0/.stack/setup-exe-cache/x86_64-linux/Cabal-simple_mPHDZzAJ_3.0.1.0_ghc-8.8.4 --builddir=.stack-work/dist/x86_64-linux/Cabal-3.0.1.0 build lib:spago exe:spago --ghc-options ""
    Process exited with code: ExitFailure 1

```sh
[14 of 29] Compiling Spago.GlobalCache

/builddir/spago-0.16.0/src/Spago/GlobalCache.hs:153:3: error:
    • Could not deduce (MonadThrow m)
        arising from a use of ‘assertDirectory’
      from the context: (MonadIO m, HasLogFunc env, MonadReader env m)
        bound by the type signature for:
                   getGlobalCacheDir :: forall (m :: * -> *) env.
                                        (MonadIO m, HasLogFunc env, MonadReader env m) =>
                                        m FilePath.FilePath
        at src/Spago/GlobalCache.hs:150:1-90
      Possible fix:
        add (MonadThrow m) to the context of
          the type signature for:
            getGlobalCacheDir :: forall (m :: * -> *) env.
                                 (MonadIO m, HasLogFunc env, MonadReader env m) =>
                                 m FilePath.FilePath
    • In a stmt of a 'do' block: _ <- assertDirectory globalCache
      In the expression:
        do globalCache <- liftIO
                            $ getXdgDirectory XdgCache "spago" <|> pure ".spago-global-cache"
           assertDirectory globalCache
           return globalCache
      In an equation for ‘getGlobalCacheDir’:
          getGlobalCacheDir
            = do globalCache <- liftIO
                                  $ getXdgDirectory XdgCache "spago" <|> pure ".spago-global-cache"
                 assertDirectory globalCache
                 return globalCache
    |
153 |   assertDirectory globalCache
    |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^
Completed 180 action(s).

--  While building package spago-0.15.3 (scroll up to its section to see the error) using:
      /builddir/spago-0.16.0/.stack/setup-exe-cache/x86_64-linux/Cabal-simple_mPHDZzAJ_3.0.1.0_ghc-8.8.4 --builddir=.stack-work/dist/x86_64-linux/Cabal-3.0.1.0 build lib:spago exe:spago --ghc-options ""
    Process exited with code: ExitFailure 1
```