sblg is good because it tells you to use a Makefile and a Makefile can do any arbitrary thing in exactly as stupid and nonsensical thing you want. because it’s your system shell but with dependency manangement tacked on

% curl -I https://blog.xn--scling-oua.cat.family/index.xhtml.gz 2>&1 | grep content-length
content-length: 1249
% curl -I -H 'Accept-Encoding: gzip' https://blog.xn--scling-oua.cat.family/ 2>&1 | grep content-length
content-length: 1249

nice