diff --git a/packages/vite/src/node/cleanString.ts b/packages/vite/src/node/cleanString.ts
index 2e273f8dab57a5..d68f08502a8344 100644
--- a/packages/vite/src/node/cleanString.ts
+++ b/packages/vite/src/node/cleanString.ts
@@ -2,9 +2,9 @@ import type { RollupError } from 'rollup'
 // bank on the non-overlapping nature of regex matches and combine all filters into one giant regex
 // /`([^`\$\{\}]|\$\{(`|\g<1>)*\})*`/g can match nested string template
 // but js not support match expression(\g<0>). so clean string template(`...`) in other ways.
-const stringsRE = /"([^"]|(?<=\\)")*"|'([^']|(?<=\\)')*'/
-const commentsRE = /\/\*(.|[\r\n])*?\*\/|\/\/.*/
-const regexpRE = /\/([^\/\r\n]|(?<=\\)\/)*\//
+const stringsRE = /"([^"]|(?<=\\)")*"|'([^']|(?<=\\)')*'/.source
+const commentsRE = /\/\*(.|[\r\n])*?\*\/|\/\/.*/.source
+const regexpRE = /\/([^\/\r\n]|(?<=\\)\/)*\//.source
 const cleanerRE = new RegExp(`${stringsRE}|${commentsRE}|${regexpRE}`, 'g')
 
 const blankReplacer = (s: string) => ' '.repeat(s.length)