Resolving dependencies... Configuring bzlib-0.5.0.5... Downloading enummapset-0.5.2.1... Configuring SHA-1.6.4.2... Building bzlib-0.5.0.5... Building SHA-1.6.4.2... Installed bzlib-0.5.0.5 Configuring curl-1.3.8... Building curl-1.3.8... Installed SHA-1.6.4.2 Configuring hxt-charproperties-9.2.0.1... Building hxt-charproperties-9.2.0.1... Configuring mtl-2.2.1... Installed curl-1.3.8 Building mtl-2.2.1... Configuring network-2.6.3.1... Installed mtl-2.2.1 Configuring old-locale-1.0.0.7... Installed hxt-charproperties-9.2.0.1 Building old-locale-1.0.0.7... Building network-2.6.3.1... Configuring parallel-3.2.1.0... Installed old-locale-1.0.0.7 Building parallel-3.2.1.0... Configuring text-1.2.2.1... Installed parallel-3.2.1.0 Building text-1.2.2.1... Configuring unix-compat-0.4.3.1... Installed network-2.6.3.1 Building unix-compat-0.4.3.1... Configuring enummapset-0.5.2.1... Installed unix-compat-0.4.3.1 Building enummapset-0.5.2.1... Installed enummapset-0.5.2.1 Configuring hxt-unicode-9.0.2.4... Building hxt-unicode-9.0.2.4... Configuring hslogger-1.2.10... Installed hxt-unicode-9.0.2.4 Building hslogger-1.2.10... Installed text-1.2.2.1 Configuring parsec-3.1.11... Building parsec-3.1.11... Installed hslogger-1.2.10 Installed parsec-3.1.11 Configuring hxt-regex-xmlschema-9.2.0.3... Configuring network-uri-2.6.1.0... Building network-uri-2.6.1.0... Building hxt-regex-xmlschema-9.2.0.3... Installed network-uri-2.6.1.0 Installed hxt-regex-xmlschema-9.2.0.3 Configuring hxt-9.3.1.16... Building hxt-9.3.1.16... Installed hxt-9.3.1.16 Downloading hxt-cache-9.1.0.2... Configuring hxt-curl-9.1.1.1... Configuring hxt-cache-9.1.0.2... Building hxt-curl-9.1.1.1... Building hxt-cache-9.1.0.2... Installed hxt-curl-9.1.1.1 Installed hxt-cache-9.1.0.2 Downloading Holumbus-Searchengine-1.2.0... Configuring Holumbus-Searchengine-1.2.0... Building Holumbus-Searchengine-1.2.0... Failed to install Holumbus-Searchengine-1.2.0 Build log ( /home/builder/.cabal/logs/Holumbus-Searchengine-1.2.0.log ): cabal: Entering directory '/tmp/cabal-tmp-1380/Holumbus-Searchengine-1.2.0' Configuring Holumbus-Searchengine-1.2.0... Building Holumbus-Searchengine-1.2.0... Preprocessing library Holumbus-Searchengine-1.2.0... [ 1 of 46] Compiling Holumbus.Utility ( src/Holumbus/Utility.hs, dist/build/Holumbus/Utility.o ) [ 2 of 46] Compiling Holumbus.Query.Fuzzy ( src/Holumbus/Query/Fuzzy.hs, dist/build/Holumbus/Query/Fuzzy.o ) [ 3 of 46] Compiling Holumbus.Index.Common.LoadStore ( src/Holumbus/Index/Common/LoadStore.hs, dist/build/Holumbus/Index/Common/LoadStore.o ) [ 4 of 46] Compiling Holumbus.Index.Common.DocId ( src/Holumbus/Index/Common/DocId.hs, dist/build/Holumbus/Index/Common/DocId.o ) [ 5 of 46] Compiling Holumbus.Index.Common.DocIdMap ( src/Holumbus/Index/Common/DocIdMap.hs, dist/build/Holumbus/Index/Common/DocIdMap.o ) src/Holumbus/Index/Common/DocIdMap.hs:124:22: error: • Illegal instance declaration for ‘NFData (DocIdMap v)’ (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 ‘NFData (DocIdMap v)’ src/Holumbus/Index/Common/DocIdMap.hs:127:22: error: • Illegal instance declaration for ‘Binary (DocIdMap v)’ (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 ‘Binary (DocIdMap v)’ cabal: Leaving directory '/tmp/cabal-tmp-1380/Holumbus-Searchengine-1.2.0' cabal: Error: some packages failed to install: Holumbus-Searchengine-1.2.0 failed during the building phase. The exception was: ExitFailure 1