1 files changed, 21 insertions, 12 deletions
diff --git a/ext/node/polyfills/internal/errors.ts b/ext/node/polyfills/internal/errors.ts
index 2ba7ec28e..7f7ce9d3a 100644
--- a/ext/node/polyfills/internal/errors.ts
+++ b/ext/node/polyfills/internal/errors.ts
@@ -2421,7 +2421,7 @@ export class ERR_INVALID_PACKAGE_TARGET extends NodeError {
     if (key === ".") {
       assert(isImport === false);
       msg = `Invalid "exports" main target ${JSON.stringify(target)} defined ` +
-        `in the package config ${pkgPath}package.json${
+        `in the package config ${displayJoin(pkgPath, "package.json")}${
           base ? ` imported from ${base}` : ""
         }${relError ? '; targets must start with "./"' : ""}`;
     } else {
@@ -2429,9 +2429,11 @@ export class ERR_INVALID_PACKAGE_TARGET extends NodeError {
         JSON.stringify(
           target,
         )
-      } defined for '${key}' in the package config ${pkgPath}package.json${
-        base ? ` imported from ${base}` : ""
-      }${relError ? '; targets must start with "./"' : ""}`;
+      } defined for '${key}' in the package config ${
+        displayJoin(pkgPath, "package.json")
+      }${base ? ` imported from ${base}` : ""}${
+        relError ? '; targets must start with "./"' : ""
+      }`;
     }
     super("ERR_INVALID_PACKAGE_TARGET", msg);
   }
@@ -2444,7 +2446,9 @@ export class ERR_PACKAGE_IMPORT_NOT_DEFINED extends NodeTypeError {
     base: string,
   ) {
     const msg = `Package import specifier "${specifier}" is not defined${
-      packagePath ? ` in package ${packagePath}package.json` : ""
+      packagePath
+        ? ` in package ${displayJoin(packagePath, "package.json")}`
+        : ""
     } imported from ${base}`;
 
     super("ERR_PACKAGE_IMPORT_NOT_DEFINED", msg);
@@ -2455,14 +2459,13 @@ export class ERR_PACKAGE_PATH_NOT_EXPORTED extends NodeError {
   constructor(subpath: string, pkgPath: string, basePath?: string) {
     let msg: string;
     if (subpath === ".") {
-      msg = `No "exports" main defined in ${pkgPath}package.json${
-        basePath ? ` imported from ${basePath}` : ""
-      }`;
+      msg = `No "exports" main defined in ${
+        displayJoin(pkgPath, "package.json")
+      }${basePath ? ` imported from ${basePath}` : ""}`;
     } else {
-      msg =
-        `Package subpath '${subpath}' is not defined by "exports" in ${pkgPath}package.json${
-          basePath ? ` imported from ${basePath}` : ""
-        }`;
+      msg = `Package subpath '${subpath}' is not defined by "exports" in ${
+        displayJoin(pkgPath, "package.json")
+      }${basePath ? ` imported from ${basePath}` : ""}`;
     }
 
     super("ERR_PACKAGE_PATH_NOT_EXPORTED", msg);
@@ -2621,6 +2624,12 @@ function determineSpecificType(value: any) {
   return `type ${typeof value} (${inspected})`;
 }
 
+// Non-robust path join
+function displayJoin(dir: string, fileName: string) {
+  const sep = dir.includes("\\") ? "\\" : "/";
+  return dir.endsWith(sep) ? dir + fileName : dir + sep + fileName;
+}
+
 export { codes, genericNodeError, hideStackFrames };
 
 export default {