[Nix-dev] Help creating a custom app with Nix package manager

[Asus Ceaser]

Fixed my all-packages.conf  but once I run nix-build -A luakit I get
the following error:

building path(s)
`/nix/store/lk2qcd3fvgbc7nydclh6kin8nlh52xn5-luakit-2012.09.13-r1'
building /nix/store/lk2qcd3fvgbc7nydclh6kin8nlh52xn5-luakit-2012.09.13-r1
unpacking sources
unpacking source archive
/nix/store/cr08lf4g1i5v7xycpkaw9nck1k0mvmgj-2012.09.13-r1.tar.gz
source root is luakit-2012.09.13-r1
patching sources
configuring
no configure script, doing nothing
building
make flags: SHELL=/nix/store/qw7vn33jcv1yfsfdw19ic5r2jlqk68w3-bash-4.2-p45/bin/bash
PREFIX=$(out)
Package webkit-1.0 was not found in the pkg-config search path.
Perhaps you should add the directory containing `webkit-1.0.pc'
to the PKG_CONFIG_PATH environment variable
No package 'webkit-1.0' found
Package javascriptcoregtk-1.0 was not found in the pkg-config search path.
Perhaps you should add the directory containing `javascriptcoregtk-1.0.pc'
to the PKG_CONFIG_PATH environment variable
No package 'javascriptcoregtk-1.0' found
Package unique-1.0 was not found in the pkg-config search path.
Perhaps you should add the directory containing `unique-1.0.pc'
to the PKG_CONFIG_PATH environment variable
No package 'unique-1.0' found
config.mk:89: *** recipe commences before first target.  Stop.
builder for `/nix/store/5mw9lad3gx3jxbvrbkvriqgsbs14zx5j-luakit-2012.09.13-r1.drv'
failed with exit code 2
error: build of
`/nix/store/5mw9lad3gx3jxbvrbkvriqgsbs14zx5j-luakit-2012.09.13-r1.drv'
failed

Where should I add the webkit-1.0.pc and javascriptcoregtk-1.0?