diff --git a/.github/workflows/autobuild.yaml b/.github/workflows/autobuild.yaml
index 934a4fc..d978da5 100644
--- a/.github/workflows/autobuild.yaml
+++ b/.github/workflows/autobuild.yaml
@@ -72,9 +72,6 @@ jobs:
             "-DCMAKE_EXE_LINKER_FLAGS_RELEASE=-static-libgcc -Wl,--compress-debug-sections=zlib"
             "-DLLVM_STATIC_LINK_CXX_STDLIB=ON"
             "-DLLVM_ENABLE_ZLIB=FORCE_ON"
-          post_cmake: |
-            # Link zlib statically. LLVM 10 has no option for this!
-            sed -i 's/ -lz / -l:libz.a /' "$CLANGD_DIR/build.ninja"
     steps:
     - name: Clone scripts
       uses: actions/checkout@v2
@@ -121,8 +118,10 @@ jobs:
         "-DCLANG_PLUGIN_SUPPORT=OFF"
         "-DLLVM_ENABLE_PLUGINS=OFF"
         ${{ matrix.config.cmake }}
-
-        ${{ matrix.config.post_cmake }}
+    # LLVM 10 has no way to statically link zlib via CMake itself, AFAICT...
+    - name: Statically link zlib
+      if: matrix.config.name == 'linux'
+      run: sed -i 's/ -lz / -l:libz.a /' "$CLANGD_DIR/build.ninja"
     - name: Ninja
       run: ninja -C ${{ env.CLANGD_DIR }} clangd
     - name: Archive