Resolving dependencies... Configuring base64-bytestring-1.0.0.1... Configuring byteorder-1.0.4... Building base64-bytestring-1.0.0.1... Building byteorder-1.0.4... Installed byteorder-1.0.4 Configuring bytestring-builder-0.10.8.1.0... Building bytestring-builder-0.10.8.1.0... Configuring data-default-class-0.1.2.0... Installed base64-bytestring-1.0.0.1 Configuring dlist-0.8.0.2... Installed bytestring-builder-0.10.8.1.0 Building data-default-class-0.1.2.0... Building dlist-0.8.0.2... Configuring mtl-2.2.1... Installed data-default-class-0.1.2.0 Building mtl-2.2.1... Configuring old-locale-1.0.0.7... Installed dlist-0.8.0.2 Building old-locale-1.0.0.7... Configuring primes-0.2.1.0... Installed old-locale-1.0.0.7 Building primes-0.2.1.0... Configuring primitive-0.6.1.0... Installed mtl-2.2.1 Configuring network-2.6.3.1... Installed primes-0.2.1.0 Building primitive-0.6.1.0... Building network-2.6.3.1... Configuring random-1.1... Installed primitive-0.6.1.0 Building random-1.1... Configuring stm-2.4.4.1... Installed random-1.1 Building stm-2.4.4.1... Configuring transformers-compat-0.5.1.4... Installed network-2.6.3.1 Building transformers-compat-0.5.1.4... Configuring text-1.2.2.1... Installed stm-2.4.4.1 Building text-1.2.2.1... Configuring word8-0.1.2... Installed transformers-compat-0.5.1.4 Building word8-0.1.2... Configuring zlib-0.6.1.2... Installed word8-0.1.2 Building zlib-0.6.1.2... Installed zlib-0.6.1.2 Configuring data-default-instances-containers-0.0.1... Building data-default-instances-containers-0.0.1... Configuring data-default-instances-dlist-0.0.1... Installed data-default-instances-containers-0.0.1 Building data-default-instances-dlist-0.0.1... Configuring data-default-instances-old-locale-0.0.1... Installed data-default-instances-dlist-0.0.1 Building data-default-instances-old-locale-0.0.1... Configuring sockaddr-0.0.0... Installed data-default-instances-old-locale-0.0.1 Building sockaddr-0.0.0... Configuring async-2.1.1... Installed sockaddr-0.0.0 Building async-2.1.1... Configuring vector-0.11.0.0... Installed text-1.2.2.1 Building vector-0.11.0.0... Configuring exceptions-0.8.3... Installed async-2.1.1 Building exceptions-0.8.3... Configuring mmorph-1.0.9... Installed exceptions-0.8.3 Building mmorph-1.0.9... Configuring transformers-base-0.4.4... Installed mmorph-1.0.9 Building transformers-base-0.4.4... Installed transformers-base-0.4.4 Configuring data-default-0.7.1.1... Building data-default-0.7.1.1... Configuring hashable-1.2.4.0... Installed data-default-0.7.1.1 Building hashable-1.2.4.0... Configuring mime-types-0.1.0.7... Installed hashable-1.2.4.0 Building mime-types-0.1.0.7... Configuring blaze-builder-0.4.0.2... Installed mime-types-0.1.0.7 Building blaze-builder-0.4.0.2... Configuring parsec-3.1.11... Installed vector-0.11.0.0 Building parsec-3.1.11... Configuring monad-control-1.0.1.0... Installed blaze-builder-0.4.0.2 Building monad-control-1.0.1.0... Installed monad-control-1.0.1.0 Configuring static-hash-0.0.1... Building static-hash-0.0.1... Configuring unordered-containers-0.2.7.1... Installed parsec-3.1.11 Building unordered-containers-0.2.7.1... Configuring case-insensitive-1.2.0.7... Installed static-hash-0.0.1 Building case-insensitive-1.2.0.7... Configuring scientific-0.3.4.9... Installed case-insensitive-1.2.0.7 Building scientific-0.3.4.9... Configuring blaze-markup-0.7.1.1... Installed scientific-0.3.4.9 Configuring cookie-0.4.2.1... Installed unordered-containers-0.2.7.1 Building blaze-markup-0.7.1.1... Building cookie-0.4.2.1... Configuring lifted-base-0.2.3.8... Installed cookie-0.4.2.1 Configuring streaming-commons-0.1.16... Installed blaze-markup-0.7.1.1 Building lifted-base-0.2.3.8... Building streaming-commons-0.1.16... Installed lifted-base-0.2.3.8 Configuring network-uri-2.6.1.0... Building network-uri-2.6.1.0... Configuring http-types-0.9.1... Installed network-uri-2.6.1.0 Configuring attoparsec-0.13.1.0... Installed streaming-commons-0.1.16 Building http-types-0.9.1... Building attoparsec-0.13.1.0... Configuring vault-0.3.0.6... Installed http-types-0.9.1 Building vault-0.3.0.6... Configuring blaze-html-0.8.1.3... Installed vault-0.3.0.6 Building blaze-html-0.8.1.3... Configuring io-choice-0.0.6... Installed attoparsec-0.13.1.0 Building io-choice-0.0.6... Configuring resourcet-1.1.8.1... Installed io-choice-0.0.6 Building resourcet-1.1.8.1... Installed resourcet-1.1.8.1 Configuring wai-3.2.1.1... Building wai-3.2.1.1... Configuring http-date-0.0.6.1... Installed wai-3.2.1.1 Building http-date-0.0.6.1... Configuring http-client-0.5.4... Installed http-date-0.0.6.1 Configuring conduit-1.2.8... Installed blaze-html-0.8.1.3 Building http-client-0.5.4... Building conduit-1.2.8... Installed conduit-1.2.8 Configuring attoparsec-conduit-1.1.0... Building attoparsec-conduit-1.1.0... Installed http-client-0.5.4 Configuring http-client-conduit-0.3.0... Installed attoparsec-conduit-1.1.0 Building http-client-conduit-0.3.0... Installed http-client-conduit-0.3.0 Downloading wai-app-file-cgi-2.0.0... Configuring wai-app-file-cgi-2.0.0... Building wai-app-file-cgi-2.0.0... Failed to install wai-app-file-cgi-2.0.0 Build log ( /home/builder/.cabal/logs/wai-app-file-cgi-2.0.0.log ): cabal: Entering directory '/tmp/cabal-tmp-19613/wai-app-file-cgi-2.0.0' Configuring wai-app-file-cgi-2.0.0... Building wai-app-file-cgi-2.0.0... Preprocessing library wai-app-file-cgi-2.0.0... [ 1 of 16] Compiling Network.Wai.Application.Classic.Range ( Network/Wai/Application/Classic/Range.hs, dist/build/Network/Wai/Application/Classic/Range.o ) Network/Wai/Application/Classic/Range.hs:62:16: error: • Ambiguous type variable ‘t0’ arising from an operator section prevents the constraint ‘(Foldable t0)’ from being solved. Probable fix: use a type annotation to specify what ‘t0’ should be. These potential instances exist: instance Foldable ZipList -- Defined in ‘Control.Applicative’ instance Foldable (Either a) -- Defined in ‘Data.Foldable’ instance Foldable Maybe -- Defined in ‘Data.Foldable’ ...plus two others ...plus 24 instances involving out-of-scope types (use -fprint-potential-instances to see them all) • In the first argument of ‘satisfy’, namely ‘(`elem` " \t")’ In the expression: satisfy (`elem` " \t") In an equation for ‘spc’: spc = satisfy (`elem` " \t") Network/Wai/Application/Classic/Range.hs:62:23: error: • Ambiguous type variable ‘t0’ arising from the literal ‘" \t"’ prevents the constraint ‘(Data.String.IsString (t0 Char))’ from being solved. Probable fix: use a type annotation to specify what ‘t0’ should be. These potential instances exist: instance a ~ Char => Data.String.IsString [a] -- Defined in ‘Data.String’ ...plus two instances involving out-of-scope types (use -fprint-potential-instances to see them all) • In the second argument of ‘elem’, namely ‘" \t"’ In the first argument of ‘satisfy’, namely ‘(`elem` " \t")’ In the expression: satisfy (`elem` " \t") cabal: Leaving directory '/tmp/cabal-tmp-19613/wai-app-file-cgi-2.0.0' cabal: Error: some packages failed to install: wai-app-file-cgi-2.0.0 failed during the building phase. The exception was: ExitFailure 1