Mixins may not be defined within control directives or other mixins - node-sass

Question

I try to install npm packages. All packages install properly.
But when I try to run application using npm start at that time below error occurs:
ERROR in
./node_modules/css-loader?{"sourceMap":false,"importLoaders":1}!./node_modules/postcss-loader?{"ident":"postcss"}!./node_modules/sass-loader/lib/loader.js?{"sourceMap":false,"precision":8,"includePaths":[]}!./src/styles.scss
Module build failed:
undefined
^
Mixins may not be defined within control directives or other mixins.
in
D:\DailyJS\CIDE_SCHOOL_DEV\node_modules\#angular\material_theming.scss
(line 2440, column 10)
Error:
undefined
^
Mixins may not be defined within control directives or other mixins.
in
D:\DailyJS\CIDE_SCHOOL_DEV\node_modules\#angular\material_theming.scss
(line 2440, column 10)
at options.error
(D:\DailyJS\CIDE_SCHOOL_DEV\node_modules\node-sass\lib\index.js:291:26)
# ./src/styles.scss 4:14-187
# multi ./node_modules/font-awesome/scss/font-awesome.scss
./src/styles.scss
webpack: Failed to compile.
I don't know why this happens?
Previously I cloned the repository from Github, and then installed npm packages by using npm install. Then it worked.
But today, it gives this error:
Mixins may not be defined within control directives or other mixins.

Answer 1

Now, i found the solution there was an issue with node-sass pacakge.
so install the
npm i node-sass#4.8.1
package then it works.