diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 6e41d5db..71619368 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -125,14 +125,8 @@ jobs:
         with:
           toolchain: ${{ matrix.rust_channel }}
 
-      - name: Install ninja-build tool for aws-lc-fips-sys on Windows
-        if: runner.os == 'Windows'
-        uses: seanmiddleditch/gha-setup-ninja@v6
-
       - name: cargo test (${{ matrix.features }})
         run: cargo test --locked ${{ matrix.features }} -- --include-ignored
-        env:
-          AWS_LC_SYS_PREBUILT_NASM: "1" # for benefit of rcgen
 
   msrv:
     name: MSRV
@@ -271,4 +265,3 @@ jobs:
           cargo hack check
           --feature-powerset
           --no-dev-deps
-          --mutually-exclusive-features aws-lc-rs,aws-lc-rs-fips,aws-lc-rs-unstable