diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 89ea2c14..445fd3f4 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -83,4 +83,4 @@ jobs:
           echo 'delog = { version = "0.1.6", git = "https://github.com/LechevSpace/delog.git", rev = "e83f3fd" }' >> Cargo.toml
 
       - name: Build avr
-        run: cargo +nightly build -Z build-std=core --target=avr-none -C target-cpu=atmega328p --workspace --release
+        run: RUSTFLAGS="-C target-cpu=atmega328p" cargo +nightly build -Z build-std=core --target=avr-none --workspace --release