You could install without any error by adding "--with-out-ext":
rvm install 2.6.6 --with-out-ext=fiddle
Shin log
April 20, 2022
[Rails] Install ruby 2.6.6 by rvm in macbook pro m1 apple silicon
![[Rails] Install ruby 2.6.6 by rvm in macbook pro m1 apple silicon](https://res.cloudinary.com/dglnjopw4/image/upload/c_scale,h_400/fpkv4x1m7wyi6yo62f81uh5tvcw5)
You could install without any error by adding "--with-out-ext":
rvm install 2.6.6 --with-out-ext=fiddle