File generated in source folder during build
Generally, it is best practice to perform (or at least not preclude the user) performing out-of-source builds. Files should not by written in the source folder by the build process.
When running Docker, I typically mount the source folder read-only to enforce the condition.
Generation of July2017BladderWaterMesh1.mesh.vtk in the build process violates this rule, resulting in a build failure when source is mounted read-only.