update branch

packages/py-bluepyopt/package.py

@@ -26,7 +26,7 @@ class PyBluepyopt(PythonPackage):
 
     variant('neuron', default=True, description="Use BluePyOpt together with NEURON")
 
-    depends_on('py-setuptools', type='build')
+    depends_on("py-setuptools@:57", type="build") #TODO: remove version constraint after update to spack v0.19 (this is actually a py-deap dependency)
     depends_on('py-pandas', type='run')
     depends_on('py-numpy', type='run')
     depends_on('py-efel', type='run')