Compiler removed the -- from the css variable

[Jenno Richi Benat]

I wrote a scss code which is like this

.block{ .content{ font-size:20px; color: var(--3u7u-text-colour); } }

which translates to css into this

.block .content { font-size: 20px; color: var(3u7u-text-colour); }

The -- in the css variable is removed.

node-sass 8.0.0 (Wrapper) [JavaScript]
libsass 3.5.5 (Sass Compiler) [C/C++]