Resolving dependencies...
cabal: Could not resolve dependencies:
[__0] trying: secure-memory-0.0.0.2 (user goal)
[__1] next goal: libsodium (dependency of secure-memory)
[__1] rejecting: libsodium-1.0.18.2 (conflict: pkg-config package
libsodium==1.0.18, not found in the pkg-config database)
[__1] rejecting: libsodium-1.0.18.1 (conflict: secure-memory =>
libsodium>=1.0.18.2)
[__1] skipping: libsodium-1.0.18.0 (has the same characteristics that caused
the previous version to fail: excluded by constraint '>=1.0.18.2' from
'secure-memory')
[__1] fail (backjumping, conflict set: libsodium, secure-memory)
After searching the rest of the dependency tree exhaustively, these were the
goals I've had most trouble fulfilling: libsodium, secure-memory