Efraim Flashner schreef op wo 23-02-2022 om 12:29 [+0200]: > +    (arguments > +     '(#:import-path "github.com/niemeyer/pretty" > +       #:phases > +       (modify-phases %standard-phases > +         (add-after 'unpack 'patch-source > +           (lambda _ > +             ;; https://github.com/kr/pretty/pull/66 > +             (substitute* "src/github.com/niemeyer/pretty/formatter.go" > +               (("string\\(i\\)") "string(rune(i))"))))))) The 'patches' and 'snippet' fields of 'origin' are for patching source code. While patching in a phase works, an origin snippet seems a more natural place to me. Greetings, Maxime.