diff --git a/nix/scripts/patch-wasm.ts b/nix/scripts/patch-wasm.ts
index 99f8a40e9f3..75d6a73d9d0 100644
--- a/nix/scripts/patch-wasm.ts
+++ b/nix/scripts/patch-wasm.ts
@@ -31,9 +31,10 @@ for (const [name, wasmPath] of byName) {
 next = next.replaceAll("tree-sitter.wasm", mainWasm).replaceAll("web-tree-sitter/tree-sitter.wasm", mainWasm)
 
 // Collapse any relative prefixes before absolute store paths (e.g., "../../../..//nix/store/...")
+const nixStorePrefix = process.env.NIX_STORE || "/nix/store";
 next = next.replace(/(\.\/)+/g, "./")
-next = next.replace(/(\.\.\/)+\/?(\/nix\/store[^"']+)/g, "/$2")
-next = next.replace(/(["'])\/{2,}(\/nix\/store[^"']+)(["'])/g, "$1/$2$3")
-next = next.replace(/(["'])\/\/(nix\/store[^"']+)(["'])/g, "$1/$2$3")
+next = next.replace(new RegExp(`(\\.\\.\\/)+\\/{1,2}(${nixStorePrefix.replace(/^\//, '').replace(/\//g, "\\/")}[^"']+)`, 'g'), '/$2')
+next = next.replace(new RegExp(`(["'])\\/{2,}(\\/${nixStorePrefix.replace(/\//g, "\\/")}[^"']+)(["'])`, 'g'), '$1$2$3')
+next = next.replace(new RegExp(`(["'])\\/\\/(${nixStorePrefix.replace(/\//g, "\\/")}[^"']+)(["'])`, 'g'), '$1$2$3')
 
 if (next !== content) fs.writeFileSync(file, next)