Resolving dependencies...
Configuring primitive-0.6.1.0...
Configuring text-1.2.2.1...
Building primitive-0.6.1.0...
Building text-1.2.2.1...
Installed primitive-0.6.1.0
Configuring vector-0.11.0.0...
Building vector-0.11.0.0...
Installed text-1.2.2.1
Configuring hashable-1.2.4.0...
Building hashable-1.2.4.0...
Configuring system-filepath-0.4.13.4...
Installed hashable-1.2.4.0
Building system-filepath-0.4.13.4...
Installed system-filepath-0.4.13.4
Configuring stringable-0.1.3...
Building stringable-0.1.3...
Installed stringable-0.1.3
Configuring biocore-0.3.1...
Building biocore-0.3.1...
Installed vector-0.11.0.0
Configuring scientific-0.3.4.9...
Building scientific-0.3.4.9...
Installed biocore-0.3.1
Installed scientific-0.3.4.9
Configuring attoparsec-0.13.1.0...
Building attoparsec-0.13.1.0...
Installed attoparsec-0.13.1.0
Downloading seqloc-0.3.1.1...
Configuring seqloc-0.3.1.1...
Building seqloc-0.3.1.1...
Failed to install seqloc-0.3.1.1
Build log ( /home/builder/.cabal/logs/seqloc-0.3.1.1.log ):
cabal: Entering directory '/tmp/cabal-tmp-20474/seqloc-0.3.1.1'
Configuring seqloc-0.3.1.1...
Building seqloc-0.3.1.1...
Preprocessing library seqloc-0.3.1.1...
[1 of 8] Compiling Bio.SeqLoc.Strand ( src/Bio/SeqLoc/Strand.hs, dist/build/Bio/SeqLoc/Strand.o )

src/Bio/SeqLoc/Strand.hs:56:10: error:
    • Illegal instance declaration for ‘Stranded String’
        (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 FlexibleInstances if you want to disable this.)
    • In the instance declaration for ‘Stranded String’
cabal: Leaving directory '/tmp/cabal-tmp-20474/seqloc-0.3.1.1'
cabal: Error: some packages failed to install:
seqloc-0.3.1.1 failed during the building phase. The exception was:
ExitFailure 1