diff --git a/CHANGELOG.md b/CHANGELOG.md
index 791bf54946..2f006aebbe 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -11,10 +11,11 @@ This is the log of notable changes to EAS CLI and related packages.
 ### 🐛 Bug fixes
 
 - Fix bundle identifier resolution when native target is not provided. ([#434](https://github.com/expo/eas-cli/pull/434) by [@dsokal](https://github.com/dsokal))
+- Fix git repo root path getter on Windows. ([#429](https://github.com/expo/eas-cli/pull/429) by [@brentvatne](https://github.com/brentvatne))
 
 ### 🧹 Chores
 
-- Android credentials setup now on Graphql API ([#434](https://github.com/expo/eas-cli/pull/427) by [@quinlanj](https://github.com/quinlanj))
+- Android credentials setup now on Graphql API. ([#434](https://github.com/expo/eas-cli/pull/427) by [@quinlanj](https://github.com/quinlanj))
 
 ## [0.16.0](https://github.com/expo/eas-cli/releases/tag/v0.16.0) - 2021-05-26
 
diff --git a/packages/eas-cli/src/build/utils/repository.ts b/packages/eas-cli/src/build/utils/repository.ts
index 5d105e2790..7563cf17ae 100644
--- a/packages/eas-cli/src/build/utils/repository.ts
+++ b/packages/eas-cli/src/build/utils/repository.ts
@@ -123,7 +123,7 @@ async function makeProjectTarballAsync(): Promise<{ path: string; size: number }
       '--no-hardlinks',
       '--depth',
       '1',
-      `file://${await gitRootDirectoryAsync()}`,
+      await getGitRootFullPathAsync(),
       shallowClonePath,
     ]);
     await tar.create({ cwd: shallowClonePath, file: tarPath, prefix: 'project', gzip: true }, [
@@ -152,6 +152,18 @@ async function makeProjectTarballAsync(): Promise<{ path: string; size: number }
   return { size, path: tarPath };
 }
 
+async function getGitRootFullPathAsync() {
+  if (process.platform === 'win32') {
+    // getRootDirectoryAsync() will return C:/path/to/repo on Windows and path
+    // prefix should be file:///
+    return `file:///${await gitRootDirectoryAsync()}`;
+  } else {
+    // getRootDirectoryAsync() will /path/to/repo, and path prefix should be
+    // file:/// so only file:// needs to be prepended
+    return `file://${await gitRootDirectoryAsync()}`;
+  }
+}
+
 async function showDiffAsync() {
   const outputTooLarge = (await getGitDiffOutputAsync()).split(/\r\n|\r|\n/).length > 100;
   await gitDiffAsync({ withPager: outputTooLarge });