diff --git a/.github/workflows/build_wheels.yml b/.github/workflows/build_wheels.yml
index 52991ed3d..f102b5e75 100644
--- a/.github/workflows/build_wheels.yml
+++ b/.github/workflows/build_wheels.yml
@@ -29,8 +29,6 @@ jobs:
           CIBW_ARCHS: ${{ matrix.arch }}
           CIBW_TEST_REQUIRES: pytest
           CIBW_TEST_COMMAND: "pytest {project}/tests"
-          CC: "/usr/local/bin/gcc-13"
-          CCX: "CXX=/usr/local/bin/g++-13"
         
       # - uses: actions/upload-artifact@v3
       #   with:
diff --git a/pyproject.toml b/pyproject.toml
index 18aa5c0d8..508b3b49e 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -25,7 +25,7 @@ before-all = [
     "unzip scip.zip",
     "mv scip_install src/scip"
     ]
-environment = {SCIPOPTDIR="$(pwd)/src/scip", LD_LIBRARY_PATH="$(pwd)/src/scip/lib:LD_LIBRARY_PATH", DYLD_LIBRARY_PATH="$(pwd)/src/scip/lib:$DYLD_LIBRARY_PATH", PATH="$(pwd)/src/scip/bin:$PATH", PKG_CONFIG_PATH="$(pwd)/src/scip/lib/pkgconfig:$PKG_CONFIG_PATH"}
+environment = {SCIPOPTDIR="$(pwd)/src/scip", LD_LIBRARY_PATH="$(pwd)/src/scip/lib:LD_LIBRARY_PATH", DYLD_LIBRARY_PATH="$(pwd)/src/scip/lib:$DYLD_LIBRARY_PATH", PATH="$(pwd)/src/scip/bin:$PATH", PKG_CONFIG_PATH="$(pwd)/src/scip/lib/pkgconfig:$PKG_CONFIG_PATH", CC="/usr/local/bin/gcc-13", CCX="/usr/local/bin/g++-13"}
 repair-wheel-command = [
   "delocate-listdeps {wheel}",
   "delocate-wheel --require-archs {delocate_archs} -w {dest_dir} {wheel}",