diff --git a/.changeset/large-icons-jump.md b/.changeset/large-icons-jump.md
new file mode 100644
index 000000000..07b8523b1
--- /dev/null
+++ b/.changeset/large-icons-jump.md
@@ -0,0 +1,5 @@
+---
+'modular-scripts': patch
+---
+
+Fix repository field generation on Windows
diff --git a/packages/modular-scripts/src/build/buildPackage/getRepositoryField.ts b/packages/modular-scripts/src/build/buildPackage/getRepositoryField.ts
index e5b4dc099..6fc95a390 100644
--- a/packages/modular-scripts/src/build/buildPackage/getRepositoryField.ts
+++ b/packages/modular-scripts/src/build/buildPackage/getRepositoryField.ts
@@ -11,7 +11,10 @@ async function getRelativePathInRepo(packagePath: string) {
     ['rev-parse', '--show-toplevel'],
     { stdout: 'pipe' },
   );
-  return path.relative(gitRepoPath, packagePath);
+  return path
+    .relative(gitRepoPath, packagePath)
+    .split(path.win32.sep)
+    .join(path.posix.sep);
 }
 
 export async function getRepositoryField(packagePath: string) {