libeigen3-dev (3.3.7-2) seems too old for proxqp:
```cpp
In file included from /usr/include/eigen3/unsupported/Eigen/IterativeSolvers:29,
                   from /root/upstream_ws/install/include/proxsuite/proxqp/sparse/views.hpp:21,
                   from /root/upstream_ws/install/include/proxsuite/proxqp/sparse/solver.hpp:22,
                   from /root/upstream_ws/install/include/proxsuite/proxqp/sparse/wrapper.hpp:12,
                   from /root/upstream_ws/install/include/proxsuite/proxqp/dense/wrapper.hpp:10,
                   from /root/upstream_ws/install/include/proxsuite/proxqp/dense/dense.hpp:8,
                   from /root/target_ws/src/tsid/include/tsid/solvers/solver-proxqp.hpp:22,
                   from /root/target_ws/src/tsid/src/solvers/solver-proxqp.cpp:18:
  /usr/include/eigen3/unsupported/Eigen/src/IterativeSolvers/ConstrainedConjGrad.h: In function ‘void Eigen::internal::constrained_cg(const TMatrix&, const CMatrix&, VectorX&, const VectorB&, const VectorF&, Eigen::IterationController&)’:
  /usr/include/eigen3/unsupported/Eigen/src/IterativeSolvers/ConstrainedConjGrad.h:162:51: error: ‘cerr’ is not a member of ‘std’
    162 |     if (iter.noiseLevel() > 0 && transition) std::cerr << "CCG: transition\n";
        |                                                   ^~~~
```