Hi Maxime! > The snippet was incorrect. It should have been something like (untested): > > (replace 'build > (lambda arguments > (for-each > (lambda (directory) > (apply (assoc-ref %standard-phases 'build) > `(,@arguments #:directory ,directory))) > (list "0xacab.org/leap/bitmask-vpn/cmd/bitmask-connect" > "0xacab.org/leap/bitmask-vpn/cmd/bitmask-helper" > ...)))) Thanks so much. It worked. Regards, RG.