scipoptsuite fails catkin build without catkin clean first

[heuristicus]

Errors     << scipoptsuite:symlink /home/strands/tsc_y4_ws/logs/scipoptsuite/build.symlink.002.log                                     
Could not create symlink `/home/strands/tsc_y4_ws/devel/lib/lib*.a.a` referencing `/home/strands/tsc_y4_ws/devel/.private/scipoptsuite/lib/lib*.a.a`
Stage `symlink` failed with arguments:
  package: {'package_format': 1, 'exports': [], 'buildtool_export_depends': [], 'exec_depends': [<catkin_pkg.package.Dependency object at 0x7f35c2514530>, <catkin_pkg.package.Dependency object at 0x7f35c2514590>, <catkin_pkg.package.Dependency object at 0x7f35c25145f0>], 'name': 'scipoptsuite', 'filename': '/home/strands/tsc_y4_ws/src/strands_executive/scipoptsuite/package.xml', 'replaces': [], 'version_abi': None, 'build_export_depends': [<catkin_pkg.package.Dependency object at 0x7f35c2514650>, <catkin_pkg.package.Dependency object at 0x7f35c25146b0>, <catkin_pkg.package.Dependency object at 0x7f35c2514710>], 'doc_depends': [], 'test_depends': [], 'maintainers': [<catkin_pkg.package.Person object at 0x7f35c2519110>], 'version': '1.0.6', 'build_depends': [<catkin_pkg.package.Dependency object at 0x7f35c2514770>, <catkin_pkg.package.Dependency object at 0x7f35c25147d0>, <catkin_pkg.package.Dependency object at 0x7f35c2514830>], 'urls': [<catkin_pkg.package.Url object at 0x7f35c2519250>], 'authors': [], 'licenses': ['ZIB Academic License'], 'buildtool_depends': [<catkin_pkg.package.Dependency object at 0x7f35c2514890>], 'conflicts': [], 'description': u'This installs version 3.0.2 of SCIP optimisation suite.'}
  metadata_path: /home/strands/tsc_y4_ws/.catkin_tools/profiles/default
  devel_manifest_path: /home/strands/tsc_y4_ws/.catkin_tools/profiles/default/packages/scipoptsuite
  prebuild: False
  package_path: strands_executive/scipoptsuite
  dest_devel_path: /home/strands/tsc_y4_ws/devel
  source_devel_path: /home/strands/tsc_y4_ws/devel/.private/scipoptsuite
Traceback (most recent call last):
  File "/usr/lib/python2.7/dist-packages/catkin_tools/execution/executor.py", line 146, in async_job
    event_queue))
OSError: [Errno 17] File exists