What is the cause of the error when installing the haskell package?

Question

Haskell

I'm trying to install the encoding package... I get the following:

cabal install encoding
Resolving dependencies...
Configuring encoding-0.6.6...
Failed to install encoding-0.6.6
Build log ( /home/haskell/.cabal/logs/ghc-8.4.4/encoding-0.6.6-FpSxS0hB2DcAOz2YiS2hId.log ):
cabal: Entering directory '/tmp/cabal-tmp-21138/encoding-0.6.6'
cabal: Leaving directory '/tmp/cabal-tmp-21138/encoding-0.6.6'
cabal: Error: some packages failed to install:
encoding-0.6.6-FpSxS0hB2DcAOz2YiS2hId failed during the configure step. The
exception was:
/tmp/cabal-tmp-21138/encoding-0.6.6/dist/setup/setup.version: openFile:
resource busy (file is locked)

The package itself has loaded and lies in the depths of .cabal.
Other packages downloaded and installed fine, but this one didn't. What is the reason behind setup.version blocking? Or am I doing something wrong?
The version of the package is not important. Tried to put different ones.
I put everything on a virtual machine. I put everything globally, because for one project.
Where to dig?

Answer 1

Perhaps you are running the installation of the same package in parallel.