gistfile1.txt

~/work/haskell $ cabal install RSA
Resolving dependencies...
Configuring RSA-1.0.6.2...
Warning: This package indirectly depends on multiple versions of the same
package. This is highly likely to cause a compile failure.
package SHA-1.5.0.0 requires binary-0.5.0.2
package pureMD5-2.1.0.3 requires binary-0.5.0.2
package RSA-1.0.6.2 requires binary-0.5.0.2
package binary-0.5.0.2 requires containers-0.4.1.0
package semigroups-0.8 requires containers-0.4.2.0
package data-default-0.3.0 requires containers-0.4.2.0
package cereal-0.3.5.0 requires containers-0.4.2.0
package binary-0.5.0.2 requires containers-0.4.2.0
Building RSA-1.0.6.2...
Preprocessing library RSA-1.0.6.2...
<command line>: cannot satisfy -package-id binary-0.5.0.2-6f0d014d3be23545fe270097a7f3c273: 
    binary-0.5.0.2-6f0d014d3be23545fe270097a7f3c273 is shadowed by package binary-0.5.0.2-417372e05b93d9fea0831a6df8c85d25
    (use -v for more information)
cabal: Error: some packages failed to install:
RSA-1.0.6.2 failed during the building phase. The exception was:
ExitFailure 1