id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc	os	architecture	failure	difficulty	testcase	blockedby	blocking	related
3268	implement the Cabal ${pkgroot} spec extension	duncan		"See the proposal for relative paths in installed package descriptions:

http://www.haskell.org/pipermail/libraries/2009-May/011772.html

Basically it amounts to replacing ghc's current `$topdir` and `$httptopdir` with variables that are interpreted relative to the package db file itself rather than relative to where ghc is installed (though for the global package db these coincide).

The open question is how tools discover the location of the package dbs. The proposed spec extension does not specify this, but perhaps it should specify an extension to (the hypothetical) `hc-pkg` system to discover the default set of package dbs and their paths."	feature request	closed	normal	7.2.1	Package system	6.10.2	fixed			Unknown/Multiple	Unknown/Multiple	None/Unknown	Unknown