Resolving dependencies...
Configuring yi-0.4.6.2...
Building yi-0.4.6.2...
Failed to install yi-0.4.6.2
Build log ( /home/builder/.cabal/logs/yi-0.4.6.2.log ):
cabal: Entering directory '/tmp/cabal-tmp-16935/yi-0.4.6.2'
Configuring yi-0.4.6.2...
Building yi-0.4.6.2...
Preprocessing library yi-0.4.6.2...

Yi/Core.hs:1:14: warning:
    -XPatternSignatures is deprecated: use -XScopedTypeVariables or pragma {-# LANGUAGE ScopedTypeVariables #-} instead

Yi/Eval.hs:1:14: warning:
    -XPatternSignatures is deprecated: use -XScopedTypeVariables or pragma {-# LANGUAGE ScopedTypeVariables #-} instead

Yi/History.hs:1:14: warning:
    -XPatternSignatures is deprecated: use -XScopedTypeVariables or pragma {-# LANGUAGE ScopedTypeVariables #-} instead

Yi/IncrementalParse.hs:2:12: warning:
    -fglasgow-exts is deprecated: Use individual extensions instead

Yi/Interpreter.hs:2:12: warning:
    -fglasgow-exts is deprecated: Use individual extensions instead

Yi/Lexer/Alex.hs:1:12: warning:
    -fglasgow-exts is deprecated: Use individual extensions instead

Yi/Syntax/Fractal.hs:1:12: warning:
    -fglasgow-exts is deprecated: Use individual extensions instead

Yi/Syntax/Layout.hs:1:12: warning:
    -fglasgow-exts is deprecated: Use individual extensions instead
[ 1 of 94] Compiling Yi.UI.Common[boot] ( Yi/UI/Common.hs-boot, dist/build/Yi/UI/Common.o-boot )

Yi/UI/Common.hs-boot:1:8: error:
    Failed to load interface for ‘Prelude’
    It is a member of the hidden package ‘base-4.9.0.0’.
    Perhaps you need to add ‘base’ to the build-depends in your .cabal file.
    Use -v to see a list of the files searched for.
cabal: Leaving directory '/tmp/cabal-tmp-16935/yi-0.4.6.2'
cabal: Error: some packages failed to install:
yi-0.4.6.2 failed during the building phase. The exception was:
ExitFailure 1