diff --git a/internal/linker/index.js b/internal/linker/index.js
index 35b4cdf1c5..9a60a9552d 100644
--- a/internal/linker/index.js
+++ b/internal/linker/index.js
@@ -416,7 +416,7 @@ function main(args, runfiles) {
                             runfilesPath = runfilesPath.slice(externalPrefix.length);
                         }
                         else {
-                            runfilesPath = `${workspace}/${runfilesPath}`;
+                            runfilesPath = path.posix.join(workspace, runfilesPath);
                         }
                         try {
                             target = runfiles.resolve(runfilesPath);
diff --git a/internal/linker/link_node_modules.ts b/internal/linker/link_node_modules.ts
index dcf7381727..104f8655d4 100644
--- a/internal/linker/link_node_modules.ts
+++ b/internal/linker/link_node_modules.ts
@@ -623,7 +623,7 @@ export async function main(args: string[], runfiles: Runfiles) {
         if (runfilesPath.startsWith(externalPrefix)) {
           runfilesPath = runfilesPath.slice(externalPrefix.length);
         } else {
-          runfilesPath = `${workspace}/${runfilesPath}`;
+          runfilesPath = path.posix.join(workspace, runfilesPath);
         }
         try {
           target = runfiles.resolve(runfilesPath);