ghc and ghci don't read the default package environment file on Windows
Summary
According to the package environments section of the User Guide, ghc
and ghci
invocations should use the $HOME/.ghc/arch-os-version/environments/default
package environment file if it exists and no specific options have been given to the contrary.
This works correctly on Linux, but the file is not being found on Windows.
On my machine, the default package environment is located at C:\Users\myuser\.ghc\x86_64-mingw32-8.10.3\environments\default
.
Steps to reproduce
Create a package environment file in the default location. The simplest way is to install a library with cabal install --lib
:
cabal install --lib sop-core
Then, in an empty folder, start ghci
, then try to import Data.SOP.NP
.
Also create a Main.hs
which imports Data.SOP.NP
and try to compile with ghc
.
Expected behavior
Neither ghci
nor ghc
should complain about not finding the module.
ghci
should show a Loaded package environment from...
message when starting up.
Environment
-
GHC version used: 8.10.3
-
Operating System: Windows 10