Issue installing some packages with nixpkgs

[Blake Sweeney]

Hi,

I'm trying to install some packages using nixpkgs on osx using egg2nix and ran
into a strange issue with llrb-tree. It cannot be installed because of failure
to create a strange path. Other packages like srfi-69, list-utils, etc can be
installed though. Below is a snippet of trying to install llrb-tree:

these derivations will be built:
  /nix/store/88v0h58kdj8jlyp4r40f9ppkjhr6drz1-chicken-llrb-tree-0.3.8.drv
building 
'/nix/store/88v0h58kdj8jlyp4r40f9ppkjhr6drz1-chicken-llrb-tree-0.3.8.drv'...
unpacking sources
unpacking source archive 
/nix/store/2gaq2jwbg6788dkvfq200947d6x461qy-chicken-llrb-tree-export
source root is chicken-llrb-tree-export
patching sources
configuring
no configure script, doing nothing
building
no Makefile, doing nothing
installing

Error: (create-directory) cannot create directory - Permission denied: 
"/homeless-shelter"
builder for 
'/nix/store/88v0h58kdj8jlyp4r40f9ppkjhr6drz1-chicken-llrb-tree-0.3.8.drv' 
failed with exit code 70
error: build of 
'/nix/store/88v0h58kdj8jlyp4r40f9ppkjhr6drz1-chicken-llrb-tree-0.3.8.drv' failed

Attached is a shell.nix that can reproduce the issue. Note that on osx, you will
need a very up-to-date nix as chicken was just marked as working on osx.

I'm guessing that at some point chicken-install wants to create a path in $HOME,
which is set to /homeless-shelter by nix during a build. Nix already sets
CHICKEN_INSTALL_PREFIX and CHICKEN_INSTALL_REPOSITORY, but is there any other
path that needs to be set/created? Thanks for any help!


Kind Regards,
Blake Sweeney