/usr/ is in libghc-yesod-auth-oauth-prof 1.2.0-1build5.
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..
/usr/lib/
/usr/lib/haskell-packages/
/usr/lib/haskell-packages/ghc/
/usr/lib/haskell-packages/ghc/lib/
/usr/lib/haskell-packages/ghc/lib/yesod-auth-oauth-1.2.0/
/usr/lib/haskell-packages/ghc/lib/yesod-auth-oauth-1.2.0/ghc-7.6.3/
/usr/lib/haskell-packages/ghc/lib/yesod-auth-oauth-1.2.0/ghc-7.6.3/libHSyesod-auth-oauth-1.2.0_p.a
/usr/lib/haskell-packages/ghc/lib/yesod-auth-oauth-1.2.0/ghc-7.6.3/Yesod/
/usr/lib/haskell-packages/ghc/lib/yesod-auth-oauth-1.2.0/ghc-7.6.3/Yesod/Auth/
/usr/lib/haskell-packages/ghc/lib/yesod-auth-oauth-1.2.0/ghc-7.6.3/Yesod/Auth/OAuth.p_hi
/usr/share/
/usr/share/doc/
/usr/share/doc/libghc-yesod-auth-oauth-prof/
/usr/share/doc/libghc-yesod-auth-oauth-prof/copyright
/usr/share/doc/libghc-yesod-auth-oauth-prof/changelog.Debian.gz