diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index a19bc9ad3c2..77f2e2e168d 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -42,6 +42,14 @@ jobs:
       if: matrix.os == 'windows-latest'
       run: Rename-Item C:\Users\runneradmin\.rustup\toolchains\stable-x86_64-pc-windows-msvc C:\Users\runneradmin\.rustup\toolchains\stable-x86_64-pc-windows-msvc.old
 
+    # Work around https://github.com/actions/cache/issues/403 by using GNU tar
+    # instead of BSD tar.
+    - name: Install GNU tar
+      if: matrix.os == 'macos-latest'
+      run: |
+        brew install gnu-tar
+        echo PATH="/usr/local/opt/gnu-tar/libexec/gnubin:$PATH" >> $GITHUB_ENV
+
     - name: Install Rust toolchain
       uses: actions-rs/toolchain@v1
       with:
diff --git a/Cargo.lock b/Cargo.lock
index fdb62e6ea42..320f70529f6 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1,5 +1,6 @@
 # This file is automatically @generated by Cargo.
 # It is not intended for manual editing.
+# asdasdasdasd
 [[package]]
 name = "addr2line"
 version = "0.13.0"
diff --git a/bors.toml b/bors.toml
index 4c980a24d3d..1f4eb510acb 100644
--- a/bors.toml
+++ b/bors.toml
@@ -1,7 +1,7 @@
 status = [
     "Rust (ubuntu-latest)",
     "Rust (windows-latest)",
-    # "Rust (macos-latest)",
+    "Rust (macos-latest)",
     "TypeScript (ubuntu-latest)",
     "TypeScript (windows-latest)",
 ]