* guix/derivations.scm (write-derivation)[coalesce-duplicate-inputs]: New procedure. Use it to process INPUTS. * tests/derivations.scm ("user of multiple-output derivation"): New test.
* guix/derivations.scm (write-derivation)[coalesce-duplicate-inputs]: New procedure. Use it to process INPUTS. * tests/derivations.scm ("user of multiple-output derivation"): New test.