Resolving dependencies... Configuring mtl-2.2.1... Configuring ansi-terminal-0.6.2.3... Building mtl-2.2.1... Building ansi-terminal-0.6.2.3... Installed ansi-terminal-0.6.2.3 Configuring network-2.6.3.1... Configuring terminal-size-0.3.2.1... Installed mtl-2.2.1 Building terminal-size-0.3.2.1... Building network-2.6.3.1... Configuring stringsearch-0.3.6.6... Installed terminal-size-0.3.2.1 Building stringsearch-0.3.6.6... Configuring text-1.2.2.1... Installed stringsearch-0.3.6.6 Building text-1.2.2.1... Configuring transformers-compat-0.5.1.4... Installed network-2.6.3.1 Building transformers-compat-0.5.1.4... Configuring ansi-wl-pprint-0.6.7.3... Installed transformers-compat-0.5.1.4 Building ansi-wl-pprint-0.6.7.3... Configuring zlib-0.6.1.2... Installed ansi-wl-pprint-0.6.7.3 Building zlib-0.6.1.2... Installed zlib-0.6.1.2 Configuring optparse-applicative-0.13.0.0... Building optparse-applicative-0.13.0.0... Installed text-1.2.2.1 Configuring parsec-3.1.11... Building parsec-3.1.11... Installed optparse-applicative-0.13.0.0 Installed parsec-3.1.11 Configuring network-uri-2.6.1.0... Building network-uri-2.6.1.0... Installed network-uri-2.6.1.0 Configuring HTTP-4000.3.3... Building HTTP-4000.3.3... Installed HTTP-4000.3.3 Downloading sloane-1.8... Configuring sloane-1.8... Building sloane-1.8... Failed to install sloane-1.8 Build log ( /home/builder/.cabal/logs/sloane-1.8.log ): cabal: Entering directory '/tmp/cabal-tmp-1095/sloane-1.8' [1 of 1] Compiling Main ( /tmp/cabal-tmp-1095/sloane-1.8/dist/setup/setup.hs, /tmp/cabal-tmp-1095/sloane-1.8/dist/setup/Main.o ) Linking /tmp/cabal-tmp-1095/sloane-1.8/dist/setup/setup ... Configuring sloane-1.8... Building sloane-1.8... Preprocessing executable 'sloane' for sloane-1.8... [1 of 1] Compiling Main ( sloane.hs, dist/build/sloane/sloane-tmp/Main.o ) sloane.hs:14:1: error: Failed to load interface for ‘Network.URI’ It is a member of the hidden package ‘network-uri-2.6.1.0’. Perhaps you need to add ‘network-uri’ 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-1095/sloane-1.8' cabal: Error: some packages failed to install: sloane-1.8 failed during the building phase. The exception was: ExitFailure 1