Resolve an issue with OptionKey having been moved

Author: rgommers

mesonbuild/dependencies/blas_lapack.py

@@ -23,7 +23,8 @@
 
 from .. import mlog
 from .. import mesonlib
-from ..mesonlib import MachineChoice, OptionKey
+from ..mesonlib import MachineChoice
+from ..options import OptionKey
 
 from .base import DependencyMethods, SystemDependency
 from .cmake import CMakeDependency