Building from a local source code checkout

[Konrad Hinsen]

Hi everyone,

For debugging package definitions, it would be really nice to be able to 
build a package from a checkout of the original project source code, 
rather than having to make a tarball for each modification of that 
source code. Is this possible somehow? The manual suggests that a 
package source could be something else than an origin object, such as a 
local-file, but I cannot get even local-file to work.

Konrad