+ "Return a list '(VARIABLE POSITION (STRING)) as expected by wrap-program, converted from the evaluated search-path-specification ESPS.
+ An evaluated search-path-specification is the type of things returned in a list by evaluate-search-paths: (sps . string) couples.
+ We do abuse wrap-program a bit, because it expects a list of directories, and the string we return is already a concatenation of the relevant directories. There would be no point in splitting it again and then having wrap-program joining it again, so we just pass it as is."
+ "Wrap EXEC in a script that will set the search paths to the values needed by the list of package PACKAGES."
+ "Return a G-exp that evaluates, on the build strata, to the list of search-path-specifications SPSL."