@@ -127,7 +127,7 @@ async function getWebpackEntries() {
127127    ...coreComponents , 
128128    { 
129129      id : '@material-ui/utils' , 
130-       path : 'packages/mui-utils/build/index.js' , 
130+       path : 'packages/mui-utils/build/esm/ index.js' , 
131131    } , 
132132    // TODO: Requires webpack v5 
133133    // Resolution of webpack/acorn to 7.x is blocked by nextjs (https://github.com/vercel/next.js/issues/11947) 
@@ -195,7 +195,7 @@ function createWebpackConfig(entry, environment) {
195195        '@mui/styles' : path . join ( workspaceRoot ,  'packages/mui-styles/build' ) , 
196196        '@mui/system' : path . join ( workspaceRoot ,  'packages/mui-system/build' ) , 
197197        '@mui/private-theming' : path . join ( workspaceRoot ,  'packages/mui-private-theming/build' ) , 
198-         '@mui/utils' : path . join ( workspaceRoot ,  'packages/mui-utils/build' ) , 
198+         '@mui/utils' : path . join ( workspaceRoot ,  'packages/mui-utils/build/esm ' ) , 
199199        '@mui/base' : path . join ( workspaceRoot ,  'packages/mui-base/build' ) , 
200200        '@mui/material-nextjs' : path . join ( workspaceRoot ,  'packages/mui-material-nextjs/build' ) , 
201201        '@mui/joy' : path . join ( workspaceRoot ,  'packages/mui-joy/build' ) , 
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