diff --git a/.github/ci/rust.sh b/.github/ci/rust.sh
new file mode 100755
index 00000000..af7f336c
--- /dev/null
+++ b/.github/ci/rust.sh
@@ -0,0 +1,21 @@
+#!/bin/bash
+## on push branch=main
+## on push branch~=gh-readonly-queue/main/.*
+## on pull_request
+
+set -euo pipefail
+
+echo Hello World!
+
+export RUSTUP_HOME=/ci/cache/rustup
+export CARGO_HOME=/ci/cache/cargo
+export CARGO_TARGET_DIR=/ci/cache/target
+if [ -f /ci/secrets/teleprobe-token.txt ]; then 
+    echo Got teleprobe token!
+    export TELEPROBE_TOKEN=$(cat /ci/secrets/teleprobe-token.txt)
+fi
+
+hashtime restore /ci/cache/filetime.json || true
+hashtime save /ci/cache/filetime.json
+
+./ci.sh
diff --git a/.github/workflows/rust.yml b/.github/workflows/rust.yml
deleted file mode 100644
index 0cbca31b..00000000
--- a/.github/workflows/rust.yml
+++ /dev/null
@@ -1,80 +0,0 @@
-name: Rust
-
-on:
-  push:
-    branches: [staging, trying, master]
-  pull_request:
-    branches: [master]
-
-env:
-  CARGO_TERM_COLOR: always
-
-jobs:
-  all:
-    runs-on: ubuntu-latest
-    needs: [build-nightly, build-stable, test]
-    steps:
-      - name: Done
-        run: exit 0
-  build-nightly:
-    runs-on: ubuntu-latest
-    permissions:
-      id-token: write
-      contents: read
-    steps:
-      - uses: actions/checkout@v3
-        with:
-          submodules: true
-      - name: Cache multiple paths
-        uses: actions/cache@v3
-        with:
-          path: |
-            ~/.cargo/bin/
-            ~/.cargo/registry/index/
-            ~/.cargo/registry/cache/
-            ~/.cargo/git/db/
-            target_ci
-          key: rust3-${{ runner.os }}-${{ hashFiles('rust-toolchain.toml') }}
-      - name: build
-        env:
-          TELEPROBE_TOKEN: ${{ secrets.TELEPROBE_TOKEN }}
-        run: |
-          curl -L -o /usr/local/bin/cargo-batch https://github.com/embassy-rs/cargo-batch/releases/download/batch-0.3.0/cargo-batch
-          chmod +x /usr/local/bin/cargo-batch
-          ./ci.sh
-          rm -rf target_ci/*{,/release}/{build,deps,.fingerprint}/{lib,}{embassy,stm32}*
-  build-stable:
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v3
-        with:
-          submodules: true
-      - name: Cache multiple paths
-        uses: actions/cache@v3
-        with:
-          path: |
-            ~/.cargo/bin/
-            ~/.cargo/registry/index/
-            ~/.cargo/registry/cache/
-            ~/.cargo/git/db/
-            target_ci_stable
-          key: rust-stable-${{ runner.os }}-${{ hashFiles('rust-toolchain.toml') }}
-      - name: build
-        run: |
-          curl -L -o /usr/local/bin/cargo-batch https://github.com/embassy-rs/cargo-batch/releases/download/batch-0.3.0/cargo-batch
-          chmod +x /usr/local/bin/cargo-batch
-          ./ci_stable.sh
-          rm -rf target_ci_stable/*{,/release}/{build,deps,.fingerprint}/{lib,}{embassy,stm32}*
-
-  test:
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v3
-
-      - name: Test boot
-        working-directory: ./embassy-boot/boot
-        run: cargo test && cargo test --features nightly && cargo test --features "ed25519-dalek,nightly" && cargo test --features "ed25519-salty,nightly"
-
-      - name: Test sync
-        working-directory: ./embassy-sync
-        run: cargo test
diff --git a/ci.sh b/ci.sh
index 6d906f5f..11c56932 100755
--- a/ci.sh
+++ b/ci.sh
@@ -2,7 +2,6 @@
 
 set -euo pipefail
 
-export CARGO_TARGET_DIR=$PWD/target_ci
 export RUSTFLAGS=-Dwarnings
 export DEFMT_LOG=trace