I use the esbuild-sass-plugin[1] in my Phoenix 1.6 project, using the build script they give in the doc[2] and it works for me. [1] https://github.com/glromeo/

I use the esbuild-sass-plugin[1] in my Phoenix 1.6 project, using the build script they give in the doc[2] and it works for me. [1] https://github.com/glromeo/esbuild-sass-plugin https://github.com/glromeo/esbuild-sass-plugin [2] https://hexdocs.pm/phoenix/asset_management.html#esbuild-plugins https://hexdocs.pm/phoenix/asset_management.html#esbuild-plu... Maybe it'll help someone, one difference from the plugin doc was using: const { sassPlugin } = require("esbuild-sass-plugin"); Instead of: import { sassPlugin } from "esbuild-sass-plugin"; After all, it would not be Javascript without some import syntax shenanigan ;)