diff --git a/.changeset/metal-berries-travel.md b/.changeset/metal-berries-travel.md
new file mode 100644
index 00000000..46a9031b
--- /dev/null
+++ b/.changeset/metal-berries-travel.md
@@ -0,0 +1,5 @@
+---
+"bob-the-bundler": patch
+---
+
+Correctly resolve glob patterns on Windows platform
diff --git a/src/utils/get-workspace-package-paths.ts b/src/utils/get-workspace-package-paths.ts
index f0966e17..0330042e 100644
--- a/src/utils/get-workspace-package-paths.ts
+++ b/src/utils/get-workspace-package-paths.ts
@@ -7,7 +7,7 @@ export async function getWorkspacePackagePaths(workspaces: string[], cwd = proce
     workspaces
       /** We are only interested in workspaces that are packages (for now.) */
       .filter(workspacePattern => workspacePattern.startsWith('packages/'))
-      .map(workspacePattern => path.join(workspacePattern, 'package.json')),
+      .map(workspacePattern => path.posix.join(workspacePattern, 'package.json')),
     {
       cwd,
       ignore: ['**/node_modules/**', ...buildArtifactDirectories],