Resolving dependencies...
Downloading she-0.3...
Configuring she-0.3...
Building she-0.3...
Preprocessing library she-0.3...
[1 of 1] Compiling ShePrelude       ( src/ShePrelude.lhs, dist/build/ShePrelude.o )
In-place registering she-0.3...
Preprocessing executable 'she' for she-0.3...
[ 1 of 10] Compiling Parsley          ( src/Parsley.lhs, dist/build/she/she-tmp/Parsley.o )
[ 2 of 10] Compiling HaLay            ( src/HaLay.lhs, dist/build/she/she-tmp/HaLay.o )

src/HaLay.lhs:458:12:
    Illegal instance declaration for `Alternative L'
      (All instance types must be of the form (T a1 ... an)
       where a1 ... an are *distinct type variables*,
       and each type variable appears at most once in the instance head.
       Use -XFlexibleInstances if you want to disable this.)
    In the instance declaration for `Alternative L'

src/HaLay.lhs:462:12:
    Illegal instance declaration for `Applicative L'
      (All instance types must be of the form (T a1 ... an)
       where a1 ... an are *distinct type variables*,
       and each type variable appears at most once in the instance head.
       Use -XFlexibleInstances if you want to disable this.)
    In the instance declaration for `Applicative L'
Failed to install she-0.3
cabal: Error: some packages failed to install:
she-0.3 failed during the building phase. The exception was:
ExitFailure 1