Can't evaluate python from Hy

[SqrtMinusOne]

The following doesn't seem to work in calysto_hy:

(py "print('hello')")

Stacktrace:

Traceback (most recent call last):
  File "/home/pavel/Programs/miniconda3/envs/hy/lib/python3.7/site-packages/hy/compiler.py", line 435, in compile
    ret = self.compile_atom(tree)
  File "/home/pavel/Programs/miniconda3/envs/hy/lib/python3.7/site-packages/hy/compiler.py", line 429, in compile_atom
    return Result() + _model_compilers[type(atom)](self, atom)
  File "/home/pavel/Programs/miniconda3/envs/hy/lib/python3.7/site-packages/hy/compiler.py", line 1779, in compile_expression
    self, expr, unmangle(sroot), *parse_tree)
  File "/home/pavel/Programs/miniconda3/envs/hy/lib/python3.7/site-packages/hy/compiler.py", line 1727, in compile_inline_python
    'exec' if exec_mode else 'eval').body
  File "/home/pavel/Programs/miniconda3/envs/hy/lib/python3.7/ast.py", line 35, in parse
    return compile(source, filename, mode, PyCF_ONLY_AST)
TypeError: expected str, bytes or os.PathLike object, not NoneType

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/home/pavel/Programs/miniconda3/envs/hy/lib/python3.7/site-packages/calysto_hy/kernel.py", line 143, in do_execute_direct
    _ast = hy_compile(tokens, '', root=ast.Interactive, compiler=self.compiler)
  File "/home/pavel/Programs/miniconda3/envs/hy/lib/python3.7/site-packages/hy/compiler.py", line 2168, in hy_compile
    result = compiler.compile(tree)
  File "/home/pavel/Programs/miniconda3/envs/hy/lib/python3.7/site-packages/hy/compiler.py", line 435, in compile
    ret = self.compile_atom(tree)
  File "/home/pavel/Programs/miniconda3/envs/hy/lib/python3.7/site-packages/hy/compiler.py", line 429, in compile_atom
    return Result() + _model_compilers[type(atom)](self, atom)
  File "/home/pavel/Programs/miniconda3/envs/hy/lib/python3.7/site-packages/hy/compiler.py", line 1968, in compile_list
    elts, ret, _ = self._compile_collect(expression)
  File "/home/pavel/Programs/miniconda3/envs/hy/lib/python3.7/site-packages/hy/compiler.py", line 498, in _compile_collect
    ret += self.compile(expr)
  File "/home/pavel/Programs/miniconda3/envs/hy/lib/python3.7/site-packages/hy/compiler.py", line 451, in compile
    reraise(HyCompileError, HyCompileError(exc_msg), sys.exc_info()[2])
  File "/home/pavel/Programs/miniconda3/envs/hy/lib/python3.7/site-packages/hy/_compat.py", line 13, in reraise
    raise value.with_traceback(traceback)
  File "/home/pavel/Programs/miniconda3/envs/hy/lib/python3.7/site-packages/hy/compiler.py", line 435, in compile
    ret = self.compile_atom(tree)
  File "/home/pavel/Programs/miniconda3/envs/hy/lib/python3.7/site-packages/hy/compiler.py", line 429, in compile_atom
    return Result() + _model_compilers[type(atom)](self, atom)
  File "/home/pavel/Programs/miniconda3/envs/hy/lib/python3.7/site-packages/hy/compiler.py", line 1779, in compile_expression
    self, expr, unmangle(sroot), *parse_tree)
  File "/home/pavel/Programs/miniconda3/envs/hy/lib/python3.7/site-packages/hy/compiler.py", line 1727, in compile_inline_python
    'exec' if exec_mode else 'eval').body
  File "/home/pavel/Programs/miniconda3/envs/hy/lib/python3.7/ast.py", line 35, in parse
    return compile(source, filename, mode, PyCF_ONLY_AST)
hy.errors.HyCompileError: Internal Compiler Bug 😱
⤷ Traceback (most recent call last):
  File "/home/pavel/Programs/miniconda3/envs/hy/lib/python3.7/site-packages/hy/compiler.py", line 435, in compile
    ret = self.compile_atom(tree)
  File "/home/pavel/Programs/miniconda3/envs/hy/lib/python3.7/site-packages/hy/compiler.py", line 429, in compile_atom
    return Result() + _model_compilers[type(atom)](self, atom)
  File "/home/pavel/Programs/miniconda3/envs/hy/lib/python3.7/site-packages/hy/compiler.py", line 1779, in compile_expression
    self, expr, unmangle(sroot), *parse_tree)
  File "/home/pavel/Programs/miniconda3/envs/hy/lib/python3.7/site-packages/hy/compiler.py", line 1727, in compile_inline_python
    'exec' if exec_mode else 'eval').body
  File "/home/pavel/Programs/miniconda3/envs/hy/lib/python3.7/ast.py", line 35, in parse
    return compile(source, filename, mode, PyCF_ONLY_AST)
TypeError: expected str, bytes or os.PathLike object, not NoneType

The following, however, does work:

(hy.eval '(py "print('hello')"))

Looks like a problem with the kernel rather than with my particular setup.