gistfile1.txt

[polinukli] ~ % ghc-pkg list --package-db=/cabal/store/ghc-8.6.5/package.db|grep hashable
    hashable-1.2.7.0
    hashable-1.2.7.0
    hashable-1.2.7.0
    hashable-1.2.7.0
    hashable-1.2.7.0
    hashable-1.2.7.0
    hashable-1.2.7.0
    hashable-1.2.7.0
    hashable-1.2.7.0
    hashable-1.3.0.0
    hashable-1.3.0.0
    hashable-1.3.0.0
    hashable-1.3.0.0
    hashable-1.3.0.0
    hashable-1.3.0.0
    hashable-1.3.0.0
    hashable-1.3.0.0
    hashable-1.3.0.0
    hashable-1.3.0.0
    hashable-1.3.0.0
    hashable-time-0.2.0.2
    hashable-time-0.2.0.2

[polinukli] ~ % ghci -package-db=/cabal/store/ghc-8.6.5/package.db 
GHCi, version 8.6.5: http://www.haskell.org/ghc/  :? for help
Loaded package environment from /home/phadej/.ghc/x86_64-linux-8.6.5/environments/default
Prelude> :m +Data.Hashable

<no location info>: error:
    Could not load module ‘Data.Hashable’
    It is a member of the hidden package ‘hashable-1.3.0.0’.
    You can run ‘:set -package hashable’ to expose it.
    (Note: this unloads all the modules in the current scope.)
    It is a member of the hidden package ‘hashable-1.3.0.0’.
    You can run ‘:set -package hashable’ to expose it.
    (Note: this unloads all the modules in the current scope.)
```