Nix build support could be very useful #60
Description
A really good idea raised by @clearyf -- a Nix set-up allowing user-level build and test could be useful in several ways.
- to reliably build liballocs much as Docker currently (in theory) does, but perhaps more easily
- helping students or casual-interest users get up-to-speed more quickly than Docker does, sidestepping problems around debugging/ptracing and the sometimes-inconvenient separateness of containers
- to build other packages using its instrumentation, that of libcrunch, and so on, by including liballocs's tools in the Nix package-build toolchain