Use isolated build directory

Author: oscarbenjamin

.github/workflows/buildwheel.yml

@@ -37,6 +37,7 @@ jobs:
         if: ${{ matrix.os == 'windows-2019' }}
 
         # We have to set this here rather than in the cibuildwheel config
+        # This is probably something to do with \ vs / in paths...
       - run: echo "PKG_CONFIG_PATH=${{ github.workspace }}/.local/lib/pkgconfig" >> $env:GITHUB_ENV
         if: ${{ matrix.os == 'windows-2019' }}
 
@@ -47,9 +48,6 @@ jobs:
           CIBW_BEFORE_ALL_WINDOWS: msys2 -c bin/cibw_before_all_windows.sh
           CIBW_BEFORE_BUILD_WINDOWS: pip install delvewheel && msys2 -c bin/cibw_before_build_windows.sh
 
-      - run: cat mybuild/meson-logs/meson-log.txt
-        if: failure()
-
       - uses: actions/upload-artifact@v4
         with:
           name: wheels-${{ matrix.os }}

pyproject.toml

@@ -27,7 +27,6 @@ skip = "*-win32 *-manylinux_i686 *-musllinux_*"
 manylinux-x86_64-image = "manylinux2014"
 manylinux-i686-image = "manylinux2014"
 test-command = "python -c \"import flint; print(str(flint.fmpz(2)))\""
-build-frontend = { name = "pip", args = ["-C", "builddir=./mybuild"] }
 
 [tool.cibuildwheel.linux.environment]
 # LD_LIBRARY_PATH is needed by auditwheel