ci: improve checks for OS

.github/workflows/ci.yml

@@ -33,7 +33,7 @@ jobs:
           cache: 'pip'
 
       - name: Set up Clang (Linux)
-        if: matrix.os == 'ubuntu-latest'
+        if: runner.os == 'Linux'
         run: |
           sudo apt-get update -y -q
           sudo apt-get install -y -q build-essential lsb-release wget software-properties-common
@@ -45,9 +45,11 @@ jobs:
           sudo update-alternatives --install /usr/bin/clang++ clang++ /usr/bin/clang++-15 100
           sudo update-alternatives --install /usr/bin/llvm-cov llvm-cov /usr/bin/llvm-cov-15 100
           sudo update-alternatives --install /usr/bin/ld ld /usr/bin/ld.lld-15 100
+          echo "CC=clang" >> $GITHUB_ENV
+          echo "CXX=clang++" >> $GITHUB_ENV
 
       - name: Set up MSVC (Windows)
-        if: matrix.os == 'windows-latest'
+        if: runner.os == 'Windows'
         uses: ilammy/msvc-dev-cmd@v1
         with:
           arch: x86_64
@@ -56,20 +58,19 @@ jobs:
         uses: lukka/get-cmake@latest
 
       - name: Set up Conan
+
         run: |
           python -m pip install --upgrade pip
           pip install conan
           conan profile detect --force
           conan export third_party/funchook --version 1.1.3
 
       - name: Build with Conan (Linux)
-        if: matrix.os == 'ubuntu-latest'
-        env:
-          CC: clang
-          CXX: clang++
+        if: runner.os == 'Linux'
         run: |
           conan create . --build=missing -s compiler.cppstd=17 -s build_type=${{ matrix.build_type }} -c tools.cmake.cmaketoolchain:generator=Ninja -s compiler.libcxx=libc++
 
       - name: Build with Conan (Windows)
+        if: runner.os == 'Windows'
         run: |
           conan create . --build=missing -s compiler.cppstd=17 -s build_type=${{ matrix.build_type }} -c tools.cmake.cmaketoolchain:generator=Ninja