Try to install second time with PyCall

pysr/julia_helpers.py

@@ -84,13 +84,13 @@ def install(julia_project=None, quiet=False, precompile=None):  # pragma: no cov
     try:
         julia.install(quiet=quiet)
     except julia.tools.PyCallInstallError:
-        raise RuntimeError(
-            "Installing PyCall.jl failed. "
-            "Please delete the folder `~/.julia/packages/PyCall`, "
-            "and re-try installation. For further assistance, "
-            "please see the issue "
-            "https://github.com/MilesCranmer/PySR/issues/257."
+        # Attempt to reset PyCall.jl's build:
+        subprocess.run(
+            ["julia", "-e", f'ENV["PYTHON"] = "{sys.executable}"; import Pkg; Pkg.build("PyCall")'],
         )
+        # Try installing again:
+        julia.install(quiet=quiet)
+
 
     Main, init_log = init_julia(julia_project, quiet=quiet, return_aux=True)
     io_arg = _get_io_arg(quiet)