diff --git a/.github/workflows/CI.yml b/.github/workflows/CI.yml
index 9f93231..ad9cc23 100644
--- a/.github/workflows/CI.yml
+++ b/.github/workflows/CI.yml
@@ -36,7 +36,6 @@ jobs:
           export AR=${HOMEBREW_PREFIX}/opt/llvm/bin/llvm-ar
           export CFLAGS="-flto=thin -O3"
           export CXXFLAGS="-flto=thin -O3"
-          export CXXSTDLIB="c++"
           export LLD=${HOMEBREW_PREFIX}/opt/llvm/bin/ld64.lld
           export RUSTFLAGS="-Clinker-plugin-lto -Clinker=$PWD/macos-linker.sh -Clink-arg=-fuse-ld=${LLD}"
           maturin build --release --target aarch64-apple-darwin --out dist -i python${{ matrix.py_version }}
@@ -129,7 +128,6 @@ jobs:
           AR: /usr/local/bin/llvm-ar
           CFLAGS: "-flto=thin -O3"
           CXXFLAGS: "-flto=thin -O3"
-          CXXSTDLIB: "c++"
           RUSTFLAGS: "-Clinker-plugin-lto -Clinker=/usr/local/bin/clang -Clink-arg=-fuse-ld=/usr/local/bin/ld.lld"
 
       - name: Install built wheel and test
@@ -171,7 +169,6 @@ jobs:
           AR: /usr/local/bin/llvm-ar
           CFLAGS: "-flto=thin -O3"
           CXXFLAGS: "-flto=thin -O3"
-          CXXSTDLIB: "c++"
           RUSTFLAGS: "-Clinker-plugin-lto -Clinker=/usr/local/bin/clang -Clink-arg=-fuse-ld=/usr/local/bin/ld.lld"
       - name: Install built wheel and test
         run: |
@@ -211,7 +208,6 @@ jobs:
           AR: /usr/local/bin/llvm-ar
           CFLAGS: "-flto=thin -O3"
           CXXFLAGS: "-flto=thin -O3"
-          CXXSTDLIB: "c++"
           RUSTFLAGS: "-Clinker-plugin-lto -Clinker=/usr/local/bin/clang -Clink-arg=-fuse-ld=/usr/local/bin/ld.lld"
       - uses: uraimo/run-on-arch-action@v2
         name: Install built wheel and test
diff --git a/.github/workflows/PR.yml b/.github/workflows/PR.yml
index 6870545..2b51105 100644
--- a/.github/workflows/PR.yml
+++ b/.github/workflows/PR.yml
@@ -36,7 +36,6 @@ jobs:
           export AR=${HOMEBREW_PREFIX}/opt/llvm/bin/llvm-ar
           export CFLAGS="-flto=thin -O3"
           export CXXFLAGS="-flto=thin -O3"
-          export CXXSTDLIB="c++"
           export LLD=${HOMEBREW_PREFIX}/opt/llvm/bin/ld64.lld
           export RUSTFLAGS="-Clinker-plugin-lto -Clinker=$PWD/macos-linker.sh -Clink-arg=-fuse-ld=${LLD}"
           maturin build --release --target aarch64-apple-darwin --out dist -i python${{ matrix.py_version }}
@@ -129,7 +128,6 @@ jobs:
           AR: /usr/local/bin/llvm-ar
           CFLAGS: "-flto=thin -O3"
           CXXFLAGS: "-flto=thin -O3"
-          CXXSTDLIB: "c++"
           RUSTFLAGS: "-Clinker-plugin-lto -Clinker=/usr/local/bin/clang -Clink-arg=-fuse-ld=/usr/local/bin/ld.lld"
 
       - name: Install built wheel and test
@@ -171,7 +169,6 @@ jobs:
           AR: /usr/local/bin/llvm-ar
           CFLAGS: "-flto=thin -O3"
           CXXFLAGS: "-flto=thin -O3"
-          CXXSTDLIB: "c++"
           RUSTFLAGS: "-Clinker-plugin-lto -Clinker=/usr/local/bin/clang -Clink-arg=-fuse-ld=/usr/local/bin/ld.lld"
       - name: Install built wheel and test
         run: |
@@ -211,7 +208,6 @@ jobs:
           AR: /usr/local/bin/llvm-ar
           CFLAGS: "-flto=thin -O3"
           CXXFLAGS: "-flto=thin -O3"
-          CXXSTDLIB: "c++"
           RUSTFLAGS: "-Clinker-plugin-lto -Clinker=/usr/local/bin/clang -Clink-arg=-fuse-ld=/usr/local/bin/ld.lld"
       - uses: uraimo/run-on-arch-action@v2
         name: Install built wheel and test