>
> > +        `(modify-phases ,phases
> > +           (replace 'configure
>
>
> To get rid of the #< error, replace this by
>
> #~(modify-phases #$phases [...])
>
> (and replace the , by #$ etc).
>
> Greetings,
> Maxime.

Thanks for the suggestion Maxime. Here's patch with fixes where I attempt to rewrite the section of the code using Gexps.

Still it ends in error as there is some mistake in the Gexps I made.

$ ./pre-inst-env guix system build gnu/system/examples/raspberry-pi-64.tmpl
;;; note: source file /home/cpethod/guix/gnu/packages/linux.scm
;;;       newer than compiled /home/pethod/guix/gnu/packages/linux.go
substitute: updating substitutes from 'https://ci.guix.gnu.org'... 100.0%
substitute: updating substitutes from 'https://bordeaux.guix.gnu.org'... 100.0%
The following derivation will be built:
  /gnu/store/zvy703ldgicckqgnggsnz0a21394hb9f-linux-libre-arm64-generic-5.16.19.drv
building /gnu/store/zvy703ldgicckqgnggsnz0a21394hb9f-linux-libre-arm64-generic-5.16.19.drv...
ice-9/psyntax.scm:2794:12: In procedure syntax-violation:
Syntax error:
/gnu/store/2xjp40qfmrdjg28zqsd919cjg00n9wrv-linux-libre-arm64-generic-5.16.19-builder:1:3387: source expression failed to match any pattern in form (let* ((srcarch #{$#}# (system->linux-srcarch (or (%current-target-system) (%current-system)))) (configs (string-append "arch/" srcarch "/configs/")) (guix_defconfig (string-append configs "guix_defconfig"))) #{$#}# (cond ((not defconfig) $~ (begin (apply (assoc-ref #{$#phases}# (quote configure)) arguments) (invoke "make" "savedefconfig") (rename-file "defconfig" guix_defconfig))) ((string? defconfig) $~ (rename-file (string-append configs #{$#defconfig}#) guix_defconfig)) (else (quote (copy-file (assoc-ref inputs "guix_defconfig") guix_defconfig)))) (modify-defconfig guix_defconfig (quote #{$#configs}#)) #{$#@}# (if extra-version $~ ((setenv "EXTRAVERSION" #{$#}# (string-append "-" extra-version))) (quote ())) (invoke "make" "guix_defconfig"))
builder for `/gnu/store/zvy703ldgicckqgnggsnz0a21394hb9f-linux-libre-arm64-generic-5.16.19.drv' failed with exit code 1
build of /gnu/store/zvy703ldgicckqgnggsnz0a21394hb9f-linux-libre-arm64-generic-5.16.19.drv failed
View build log at '/var/log/guix/drvs/zv/y703ldgicckqgnggsnz0a21394hb9f-linux-libre-arm64-generic-5.16.19.drv.gz'.
guix system: error: build of `/gnu/store/zvy703ldgicckqgnggsnz0a21394hb9f-linux-libre-arm64-generic-5.16.19.drv' failed


----
Petr