...
starting phase `build'
Checking /gnu/store/vlaq8yndpjmv55y8nwks82x1lnsm0q95-emacs-org-re-reveal-3.1.1/share/emacs/site-lisp/...
Compiling /gnu/store/vlaq8yndpjmv55y8nwks82x1lnsm0q95-emacs-org-re-reveal-3.1.1/share/emacs/site-lisp/org-re-reveal-autoloads.el...
Compiling /gnu/store/vlaq8yndpjmv55y8nwks82x1lnsm0q95-emacs-org-re-reveal-3.1.1/share/emacs/site-lisp/org-re-reveal.el...
Compiling /gnu/store/vlaq8yndpjmv55y8nwks82x1lnsm0q95-emacs-org-re-reveal-3.1.1/share/emacs/site-lisp/ox-re-reveal.el...
Invalid version syntax: ‘’ (must start with a number)
command "/gnu/store/k826y34z8zzjj57jv2nldmpw6vsdd145-emacs-minimal-27.1/bin/emacs" "--quick" "--batch" "--eval=(eval '(progn (setq byte-compile-debug t) (byte-recompile-directory (file-name-as-directory \"/gnu/store/vlaq8yndpjmv55y8nwks82x1lnsm0q95-emacs-org-re-reveal-3.1.1/share/emacs/site-lisp\") 0 1)) t)" failed with status 255
builder for `/gnu/store/q0nyh14394g1g2q9kj2cljc6kapjwdh7-emacs-org-re-reveal-3.1.1.drv' failed with exit code 1
build of /gnu/store/q0nyh14394g1g2q9kj2cljc6kapjwdh7-emacs-org-re-reveal-3.1.1.drv failed