* guix/derivations.scm (build-expression->derivation): Add `outputs' keyword parameter; pass it to `derivation'. Define `%outputs' in the prologue. * tests/derivations.scm ("build-expression->derivation with two outputs"): New test.
* guix/derivations.scm (build-expression->derivation): Add `outputs' keyword parameter; pass it to `derivation'. Define `%outputs' in the prologue. * tests/derivations.scm ("build-expression->derivation with two outputs"): New test.