initial import
fix casbah package
fix casbah package
separate FUSE code
implicits for constant derivations.  Factor out hashing.
implicits for constant derivations.  Factor out hashing.
string interpolation derivation.
Add interpolation for system derivation
blblblblbl
blblblblbl
add dependency-versions
bugfix
bugfix
thinking about typed Path derivations, and identifiable functions.
working on identifiable functions and content-hashable artifacts
working on identifiable functions and content-hashable artifacts
working on identifiable functions and content-hashable artifacts
add standard lib functions
add standard lib functions
Derivation is covariant... probably elsewhere too