Try copying Windows executable

conda_lock/conda_solver.py

@@ -3,6 +3,7 @@
 import os
 import pathlib
 import shlex
+import shutil
 import subprocess
 import sys
 import tempfile
@@ -619,21 +620,32 @@ def make_fake_python_binary(prefix: str) -> None:
 
             print(stderr_message, file=sys.stderr, flush=True, end='')
 
-            if "-m pip" not in cmd:
+            if "-m pip" in cmd:
+                # Simulate an empty `pip inspect` output
+                print('{}', flush=True)
+            else:
                 raise RuntimeError("Expected to invoke pip module with `-m pip`.")
             """
         )
     )
 
     if sys.platform == "win32":
-        # On Windows, create a batch file that calls the script
-        fake_python_binary = pathlib.Path(prefix) / "Scripts" / "python.bat"
+        # On Windows, copy sys.executable to prefix/Scripts/python.exe
+        fake_python_binary = pathlib.Path(prefix) / "Scripts" / "python.exe"
         fake_python_binary.parent.mkdir(parents=True, exist_ok=True)
-        batch_content = dedent(f"""\
+
+        # Copy the existing python.exe into the fake environment
+        shutil.copyfile(sys.executable, fake_python_binary)
+
+        # Adjust the environment to ensure our fake script is executed
+        # Create a wrapper batch file that sets PYTHONPATH
+        wrapper_batch = pathlib.Path(prefix) / "Scripts" / "python.bat"
+        wrapper_batch_content = dedent(f"""\
             @echo off
-            "{sys.executable}" "{fake_python_script}" %*
+            set PYTHONPATH={prefix};%PYTHONPATH%
+            "{fake_python_binary}" %*
         """)
-        fake_python_binary.write_text(batch_content)
+        wrapper_batch.write_text(wrapper_batch_content)
     else:
         # On Unix-like systems, create a shell script that calls the script
         fake_python_binary = pathlib.Path(prefix) / "bin" / "python"