vty's test suite doesn't build with Cabal 2

[felixonmars]

ref: jtdaugherty/vty#132

I am getting the same errors as that report. The author of vty thinks it's a Cabal issue, but I didn't find it reported here.

Preprocessing test suite 'verify-parse-terminfo-caps' for vty-5.18.1..
Building test suite 'verify-parse-terminfo-caps' for vty-5.18.1..
[1 of 4] Compiling Verify           ( test/Verify.hs, dist/build/verify-parse-terminfo-caps/Verify.dyn_o )
[2 of 4] Compiling Verify.Data.Terminfo.Parse ( test/Verify/Data/Terminfo/Parse.hs, dist/build/verify-parse-terminfo-caps/Verify/Data/Terminfo/Parse.dyn_o )
[3 of 4] Compiling Verify.Graphics.Vty.Output ( test/Verify/Graphics/Vty/Output.hs, dist/build/verify-parse-terminfo-caps/Verify/Graphics/Vty/Output.dyn_o )
[4 of 4] Compiling VerifyParseTerminfoCaps ( test/VerifyParseTerminfoCaps.hs, dist/build/verify-parse-terminfo-caps/VerifyParseTerminfoCaps.dyn_o )

test/VerifyParseTerminfoCaps.hs:39:61: warning: [-Wdeprecations]
    In the use of ‘tiGetStr’
    (imported from System.Console.Terminfo, but defined in System.Console.Terminfo.Base):
    Deprecated: "use tiGetOutput instead."
   |
39 | fromCapname ti name = fromJust $ Terminfo.getCapability ti (Terminfo.tiGetStr name)
   |                                                             ^^^^^^^^^^^^^^^^^

test/VerifyParseTerminfoCaps.hs:49:66: warning: [-Wdeprecations]
    In the use of ‘tiGetStr’
    (imported from System.Console.Terminfo, but defined in System.Console.Terminfo.Base):
    Deprecated: "use tiGetOutput instead."
   |
49 |                         return $ case Terminfo.getCapability ti (Terminfo.tiGetStr capName) of
   |                                                                  ^^^^^^^^^^^^^^^^^

<no location info>: error: module ‘Verify’ cannot be found locally

<no location info>: error:
    module ‘Verify.Data.Terminfo.Parse’ cannot be found locally

<no location info>: error:
    module ‘Verify.Graphics.Vty.Output’ cannot be found locally

[hvr]

@felixonmars this should be fixed now with the recently released http://hackage.haskell.org/package/Cabal-2.0.1.1 ; i.e. ideally you need http://hackage.haskell.org/package/cabal-install-2.0.0.1 compiled with that Cabal version; you should be able to do that via

cabal install cabal-install-2.0.0.1 --constraint='Cabal >= 2.0.1.1'