Update CI for other architectures

Author: h33p

.github/workflows/build.yml

@@ -93,8 +93,8 @@ jobs:
         rustup target add thumbv7em-none-eabihf
     - name: 'Build on non x86_64 platforms'
       run: |
-        cargo build --target i686-unknown-linux-gnu
-        cargo build --target thumbv7em-none-eabihf
+        cargo build --target i686-unknown-linux-gnu --no-default-features --features nightly
+        cargo build --target thumbv7em-none-eabihf --no-default-features --features nightly
 
     - name: "Install Rustup Components"
       run: rustup component add rust-src llvm-tools-preview