diff --git a/pyproject.toml b/pyproject.toml
index 20a14e65..2bfdc95b 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -21,9 +21,16 @@ repair-wheel-command = "LD_LIBRARY_PATH=/project/ci/lib auditwheel repair -w {de
 
 [tool.cibuildwheel.macos]
 archs = ["universal2"]
-environment = {LIBGIT2_VERSION="1.9.0", LIBSSH2_VERSION="1.11.1", OPENSSL_VERSION="3.2.3", LIBGIT2="/Users/runner/work/pygit2/pygit2/ci"}
 repair-wheel-command = "DYLD_LIBRARY_PATH=/Users/runner/work/pygit2/pygit2/ci/lib delocate-wheel --require-archs {delocate_archs} -w {dest_dir} {wheel}"
 
+[tool.cibuildwheel.macos.environment]
+LIBGIT2_VERSION = "1.9.0"
+LIBSSH2_VERSION = "1.11.1"
+OPENSSL_VERSION = "3.2.3"
+LIBGIT2 = "/Users/runner/work/pygit2/pygit2/ci"
+CFLAGS = "-I/usr/local/include"
+LDFLAGS = "-L/usr/local/lib"
+
 [tool.ruff]
 target-version = "py310"  # oldest supported Python version
 fix = true