Resolving dependencies...
Downloading takusen-oracle-0.9.2...
[1 of 1] Compiling Main             ( /tmp/takusen-oracle-0.9.2-505/takusen-oracle-0.9.2/dist/dist-sandbox-1428821d/setup/setup.hs, /tmp/takusen-oracle-0.9.2-505/takusen-oracle-0.9.2/dist/dist-sandbox-1428821d/setup/Main.o )
Linking /tmp/takusen-oracle-0.9.2-505/takusen-oracle-0.9.2/dist/dist-sandbox-1428821d/setup/setup ...
Configuring takusen-oracle-0.9.2...
setup: The program 'sqlplus' is required but it could not be found.
Failed to install takusen-oracle-0.9.2
cabal: Error: some packages failed to install:
takusen-oracle-0.9.2 failed during the configure step. The exception was:
ExitFailure 1