Resolving dependencies...
Configuring df1-0.1...
Building df1-0.1...
Failed to install df1-0.1
Build log ( /home/builder/.cabal/logs/ghc-8.2.2/df1-0.1-86HKLpY9DFdCfXPJBAIUrH.log ):
cabal: Entering directory '/tmp/cabal-tmp-19160/df1-0.1'
Configuring df1-0.1...
Preprocessing library for df1-0.1..
Building library for df1-0.1..
[1 of 4] Compiling Df1.Types        ( lib/Df1/Types.hs, dist/build/Df1/Types.o )

lib/Df1/Types.hs:76:3: error:
    ‘<>’ is not a (visible) method of class ‘Semigroup’
   |
76 |   (<>) (Message a) (Message b) = Message (a <> b)
   |   ^^^^

lib/Df1/Types.hs:77:14: error:
    The INLINE pragma for ‘<>’ lacks an accompanying binding
   |
77 |   {-# INLINE (<>) #-}
   |              ^^^^

lib/Df1/Types.hs:150:3: error:
    ‘<>’ is not a (visible) method of class ‘Semigroup’
    |
150 |   (<>) (Segment a) (Segment b) = Segment (a <> b)
    |   ^^^^

lib/Df1/Types.hs:151:14: error:
    The INLINE pragma for ‘<>’ lacks an accompanying binding
    |
151 |   {-# INLINE (<>) #-}
    |              ^^^^

lib/Df1/Types.hs:194:3: error:
    ‘<>’ is not a (visible) method of class ‘Semigroup’
    |
194 |   (<>) (Key a) (Key b) = Key (a <> b)
    |   ^^^^

lib/Df1/Types.hs:195:14: error:
    The INLINE pragma for ‘<>’ lacks an accompanying binding
    |
195 |   {-# INLINE (<>) #-}
    |              ^^^^

lib/Df1/Types.hs:238:3: error:
    ‘<>’ is not a (visible) method of class ‘Semigroup’
    |
238 |   (<>) (Value a) (Value b) = Value (a <> b)
    |   ^^^^

lib/Df1/Types.hs:239:14: error:
    The INLINE pragma for ‘<>’ lacks an accompanying binding
    |
239 |   {-# INLINE (<>) #-}
    |              ^^^^
cabal: Leaving directory '/tmp/cabal-tmp-19160/df1-0.1'
cabal: Error: some packages failed to install:
df1-0.1-86HKLpY9DFdCfXPJBAIUrH failed during the building phase. The exception
was:
ExitFailure 1