Resolving dependencies...
Configuring mtl-2.2.1...
Configuring text-1.2.2.1...
Building mtl-2.2.1...
Building text-1.2.2.1...
Installed mtl-2.2.1
Installed text-1.2.2.1
Configuring parsec-3.1.11...
Building parsec-3.1.11...
Installed parsec-3.1.11
Downloading ggtsTC-0.5...
Configuring ggtsTC-0.5...
Building ggtsTC-0.5...
Failed to install ggtsTC-0.5
Build log ( /home/builder/.cabal/logs/ggtsTC-0.5.log ):
cabal: Entering directory '/tmp/cabal-tmp-30645/ggtsTC-0.5'
Configuring ggtsTC-0.5...
Building ggtsTC-0.5...
Preprocessing executable 'TC' for ggtsTC-0.5...
[ 1 of 10] Compiling Zp               ( src/Zp.hs, dist/build/TC/TC-tmp/Zp.o )
[ 2 of 10] Compiling Graph            ( src/Graph.hs, dist/build/TC/TC-tmp/Graph.o )
[ 3 of 10] Compiling ErrMsg           ( src/ErrMsg.hs, dist/build/TC/TC-tmp/ErrMsg.o )

src/ErrMsg.hs:22:10: error:
    • No instance for (Applicative ErrMsg)
        arising from the superclasses of an instance declaration
    • In the instance declaration for ‘Monad ErrMsg’
cabal: Leaving directory '/tmp/cabal-tmp-30645/ggtsTC-0.5'
cabal: Error: some packages failed to install:
ggtsTC-0.5 failed during the building phase. The exception was:
ExitFailure 1