Address code review

Author: corona10

.github/workflows/build.yml

@@ -160,11 +160,8 @@ jobs:
     - name: Prepare homebrew environment variables
       run: |
         brew install pkg-config openssl@1.1 xz gdbm tcl-tk
-        echo "CFLAGS=-I$(brew --prefix gdbm)/include -I$(brew --prefix xz)/include" >> $GITHUB_ENV
-        echo "LDFLAGS=-L$(brew --prefix gdbm)/lib -I$(brew --prefix xz)/lib" >>  $GITHUB_ENV
-        echo "PKG_CONFIG_PATH=$(brew --prefix tcl-tk)/lib/pkgconfig" >> $GITHUB_ENV
     - name: Configure CPython
-      run: ./configure --with-pydebug --with-openssl=$(brew --prefix openssl@1.1)
+      run: CFLAGS="-I$(brew --prefix gdbm)/include -I$(brew --prefix xz)/include" LDFLAGS="-L$(brew --prefix gdbm)/lib -I$(brew --prefix xz)/lib" PKG_CONFIG_PATH="$(brew --prefix tcl-tk)/lib/pkgconfig" ./configure --with-pydebug --with-openssl=$(brew --prefix openssl@1.1)
     - name: Build CPython
       run: make -j4
     - name: Display build info