diff --git a/components/webpack/webpack-plugin-depfile.js b/components/webpack/webpack-plugin-depfile.js
index 41a2ada95f8..1f2ce222720 100644
--- a/components/webpack/webpack-plugin-depfile.js
+++ b/components/webpack/webpack-plugin-depfile.js
@@ -36,7 +36,11 @@ class GenerateDepfilePlugin {
     // These hooks cannot be used async, so must do sync ops.
     compiler.hooks.compilation.tap(this.constructor.name, (compilation) => {
       compilation.hooks.finishModules.tap(this.constructor.name, (modules) => {
-        const absoluteDepsPaths = Array.from(modules).map(module => module.resource)
+        // Resolve all symlinks/junctions to real paths. Siso doesn't handle
+        // junctions on Windows well, so we need to resolve them here.
+        const absoluteDepsPaths = Array.from(modules)
+          .filter(module => module.resource)
+          .map(module => fs.realpathSync(module.resource))
         const depfileContent = generateDepfileContent(this.options.depfileSourceName, absoluteDepsPaths)
         writeDepfileContentSync(this.options.depfilePath, depfileContent)
       })