Am Samstag, 19. Januar 2013 schrieb Ludovic Courtès:

> This has to do with how guix-package interprets package names.

>

> As noted in the manual, users can write either “guix-package -i guile”

> or “guix-package -i guile-2.0.7”. In the latter case, guix-package

> assumes that “2.0.7” is a version number, and then searches all packages

> whose name is “guile” and whose version is “2.0.7”.

>

> In your case, it searches for packages named “libjpeg” and whose version

> number is “8”–which fails.

>

> The fix it to not introduce the version number in the ‘name’ field, and

> instead leave it in the ‘version’ field.

Thanks for the explanation. I was confusing scheme variable names and package names, which are the same most of the time. With

(define-public libjpeg-8

(package (inherit libjpeg)

(name "libjpeg")

(version "8d")

$ guix-package -i libjpeg-8d

indeed works as expected.

However, now

$ guix-build libjpeg-8d

returns

libjpeg-8d: unknown package

Using the scheme variable name does not help:

$ guix-build libjpeg-8

libjpeg-8: unknown package

Could the behaviour of guix-build be made the same as that of guix-package?

Andreas