Try installing to prefix

.github/workflows/wheels.yml

@@ -159,7 +159,9 @@ jobs:
 
           # macOS libomp requires special configs. BREW_LIBOMP=1 asks suitesparse.sh to include them.
           # SUITESPARSE_MACOS_ARCH asks to build a particular architecture. Either x86 or arm64.
-          CIBW_ENVIRONMENT_MACOS: BREW_LIBOMP="1" SUITESPARSE_MACOS_ARCH=${{ matrix.cibw_archs }}
+          CIBW_ENVIRONMENT_MACOS: BREW_LIBOMP="1" SUITESPARSE_MACOS_ARCH=${{ matrix.cibw_archs }} GRAPHBLAS_PREFIX="/tmp/graphblas"
+
+          CIBW_ENVIRONMENT_LINUX: GRAPHBLAS_PREFIX="/tmp/graphblas"
 
           # Uncomment to only build CPython wheels
           # CIBW_BUILD: "cp*"

build_graphblas_cffi.py

@@ -41,6 +41,9 @@ def tree(dir_path: Path, prefix: str=''):
 # Expected subdirectories: include/ (contains GraphBLAS.h), lib/, and bin/ (on Windows only)
 # Otherwise fallback to default system folders.
 graphblas_root = os.environ.get("GraphBLAS_ROOT", None)
+if not graphblas_root:
+    graphblas_root = os.environ.get("GRAPHBLAS_PREFIX", None)
+
 if not graphblas_root:
     # Windows wheels.yml configures suitesparse.sh to install GraphBLAS to "C:\\GraphBLAS".
     graphblas_root = "C:\\GraphBLAS" if is_win else sys.prefix

suitesparse.sh

@@ -117,7 +117,8 @@ fi
 # Level 2, "run", means that pre-JIT kernels may be used, which does not require a compiler at runtime.
 cmake .. -DJITINIT=2 -DCMAKE_BUILD_TYPE=Release -G 'Unix Makefiles' "${cmake_params[@]}"
 make -j$NPROC
-make install
+#make install
+cmake --install build --prefix ${GRAPHBLAS_PREFIX}
 
 if [ -n "${CMAKE_GNUtoMS}" ]; then
     if [ -z "${GRAPHBLAS_PREFIX}" ]; then