title: i cant install vortexje
body: <p>Why did this happen?</p>
  <pre><code>aliop@pop-os:~/Music$ make
  [  2%] Built target airfoils
  [  5%] Built target boundary-layers
  [  7%] Built target empirical-wakes
  [ 12%] Built target surface-loaders
  [ 15%] Built target rply
  [ 20%] Built target surface-writers
  [ 22%] Built target field-writers
  [ 25%] Built target shape-generators
  Consolidate compiler generated dependencies of target vortexje
  [ 27%] Building CXX object 
  vortexje/CMakeFiles/vortexje.dir/solver.cpp.o
  In file included from /usr/include/c++/11/vector:67,
                   from /usr/include/eigen3/Eigen/SparseCore:15,
                   from 
  /usr/include/eigen3/Eigen/IterativeLinearSolvers:11,
                   from /home/aliop/Music/vortexje- 
  master/vortexje/solver.cpp:23:
  /usr/include/c++/11/bits/stl_vector.h: In instantiation of ‘class 
  std::vector&lt;std::vector&lt;Eigen::Matrix&lt;double, 3, 1&gt;, 
  Eigen::aligned_allocator&lt;Eigen::Matrix&lt;double, 3, 1&gt; &gt; &gt;, 
  Eigen::aligned_allocator&lt;std::vector&lt;Eigen::Matrix&lt;double, 3, 1&gt; 
  &gt; &gt; &gt;’:
  /home/aliop/Music/vortexje-master/vortexje/solver.cpp:1003:117:   
  required from here
  /usr/include/c++/11/bits/stl_vector.h:404:64: error: static 
  assertion failed: std::vector must have the same value_type as 
  its allocator
   404 |       static_assert(is_same&lt;typename _Alloc::value_type, 
  _Tp&gt;::value,
        |                                                                
  ^~~~~
  /usr/include/c++/11/bits/stl_vector.h:404:64: note: ‘std::integral_constant&lt;bool, false&gt;::value’ evaluates to false
  make[2]: *** [vortexje/CMakeFiles/vortexje.dir/build.make:90: vortexje/CMakeFiles/vortexje.dir/solver.cpp.o] Error 1
  make[1]: *** [CMakeFiles/Makefile2:474: vortexje/CMakeFiles/vortexje.dir/all] Error 2
  make: *** [Makefile:166: all] Error 2
  </code></pre>
  <p>I cant solve it please help me
  useful link: <a href="https://github.com/jbaayen/vortexje.git" rel="nofollow noreferrer">https://github.com/jbaayen/vortexje.git</a></p>