diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index ed88c77243..b1655f1ca6 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -376,9 +376,6 @@ jobs:
           target: thumbv7m-none-eabi
           override: true
 
-      - name: Disable optimisation profiles
-        run: sed -i '/^\[profile.*build-override]$/,/^$/{/^#/!{/^$/!d}}' Cargo.toml
-
       - uses: actions-rs/cargo@v1
         with:
           use-cross: false
@@ -420,9 +417,6 @@ jobs:
           target: thumbv6m-none-eabi
           override: true
 
-      - name: Disable optimisation profiles
-        run: sed -i '/^\[profile.*build-override]$/,/^$/{/^#/!{/^$/!d}}' Cargo.toml
-
       - uses: actions-rs/cargo@v1
         with:
           use-cross: false