Scheme system compliant with the features defined in R5RS Formula was removed
Last version was
stklos requires the following formulae to be installed:
gmp 6.1.2_2 GNU multiple precision arithmetic library
pcre 8.42 Perl compatible regular expressions library
bdw-gc 7.6.4 Garbage collector for C and C++

Recent formula history

ilovezfs stklos: delete
Oliver Newman stklos: fully scope test shell_output call
Nikolaus Wittenstein Add descriptions to all remaining homebrew packages
Baptiste Fontaine stklos: test added

Formula code at GitHub