Relax bootstrap process on build string

conda/conda-bootstrap.py

@@ -82,6 +82,7 @@ def parse_dependencies(python, path):
 def conda_install(subcmd, env, packages):
   specs = []
   for k in packages:
+    k = ' '.join(k.split()[:2]) #remove eventual build string
     if any(elem in k for elem in '><|'): specs.append(k.replace(' ', ''))
     else: specs.append(k.replace(' ', '='))
   cmd = [CONDA, subcmd, '--yes', '--name', env] + specs