diff --git a/Include/internal/pystate.h b/Include/internal/pystate.h
@@ -52,9 +52,17 @@ typedef struct _PyPathConfig {
    wchar_t *program_name;
    /* Set by Py_SetPythonHome() or PYTHONHOME environment variable */
    wchar_t *home;
} _PyPathConfig;

-#define _PyPathConfig_INIT {.module_search_path = NULL}
/* Note: _PyPathConfig_INIT sets other fields to 0/NULL */

PyAPI_DATA(_PyPathConfig) _Py_path_config;

diff --git a/Modules/main.c b/Modules/main.c
@@ -1953,19 +1953,9 @@ pymain_read_conf_impl(_PyMain *pymain, _Py_CommandLineDetails *cmdline)
        return -1;
    }

-    /* On Windows, _PyPathConfig_Init() modifies Py_IsolatedFlag and
-       Py_NoSiteFlag variables if a "._pth" file is found. */
-    int init_isolated = Py_IsolatedFlag;
-    int init_no_site = Py_NoSiteFlag;
-    Py_IsolatedFlag = cmdline->isolated;
-    Py_NoSiteFlag = cmdline->no_site_import;
-
-    err = _PyCoreConfig_Read(config);
-
-    cmdline->isolated = Py_IsolatedFlag;
-    cmdline->no_site_import = Py_NoSiteFlag;
-    Py_IsolatedFlag = init_isolated;
-    Py_NoSiteFlag = init_no_site;

    if (_Py_INIT_FAILED(err)) {
        pymain->err = err;
@@ -2116,7 +2106,7 @@ config_init_locale(_PyCoreConfig *config)
 */

_PyInitError
-_PyCoreConfig_Read(_PyCoreConfig *config)
{
    _PyInitError err;

@@ -2161,7 +2151,7 @@ _PyCoreConfig_Read(_PyCoreConfig *config)
    }

    if (!config->_disable_importlib) {
-        err = _PyCoreConfig_InitPathConfig(config);
        if (_Py_INIT_FAILED(err)) {
            return err;
        }

diff --git a/PC/getpathp.c b/PC/getpathp.c
@@ -553,8 +553,7 @@ get_program_full_path(const _PyCoreConfig *core_config,


static int
-read_pth_file(_PyPathConfig *config, wchar_t *prefix, const wchar_t *path,
-              int *isolated, int *nosite)
{
    FILE *sp_file = _Py_wfopen(path, L"r");
    if (sp_file == NULL) {
@@ -563,8 +562,8 @@ read_pth_file(_PyPathConfig *config, wchar_t *prefix, const wchar_t *path,

    wcscpy_s(prefix, MAXPATHLEN+1, path);
    reduce(prefix);
-    *isolated = 1;
-    *nosite = 1;

    size_t bufsiz = MAXPATHLEN;
    size_t prefixlen = wcslen(prefix);
@@ -589,9 +588,10 @@ read_pth_file(_PyPathConfig *config, wchar_t *prefix, const wchar_t *path,
        }

        if (strcmp(line, "import site") == 0) {
-            *nosite = 0;
            continue;
-        } else if (strncmp(line, "import ", 7) == 0) {
            Py_FatalError("only 'import site' is supported in ._pth file");
        }

@@ -680,11 +680,7 @@ calculate_pth_file(_PyPathConfig *config, wchar_t *prefix)
        return 0;
    }

-    /* FIXME, bpo-32030: Global configuration variables should not be modified
-       here, _PyPathConfig_Init() is called early in Python initialization:
-       see pymain_cmdline(). */
-    return read_pth_file(config, prefix, spbuffer,
-                         &Py_IsolatedFlag, &Py_NoSiteFlag);
}



diff --git a/Python/pathconfig.c b/Python/pathconfig.c
@@ -283,7 +283,8 @@ core_config_init_module_search_paths(_PyCoreConfig *config,


_PyInitError
-_PyCoreConfig_InitPathConfig(_PyCoreConfig *config)
{
    _PyPathConfig path_config = _PyPathConfig_INIT;
    _PyInitError err;
@@ -344,6 +345,13 @@ _PyCoreConfig_InitPathConfig(_PyCoreConfig *config)
        }
    }

    _PyPathConfig_Clear(&path_config);
    return _Py_INIT_OK();

@@ -365,30 +373,25 @@ pathconfig_global_init(void)
    }

    _PyInitError err;
-    _PyPathConfig path_config = _PyPathConfig_INIT;
    _PyCoreConfig config = _PyCoreConfig_INIT;

-    err = _PyCoreConfig_Read(&config);
    if (_Py_INIT_FAILED(err)) {
        goto error;
    }

-    err = _PyPathConfig_Calculate(&path_config, &config);
    if (_Py_INIT_FAILED(err)) {
        goto error;
    }

-    err = _PyPathConfig_SetGlobal(&path_config);
-    if (_Py_INIT_FAILED(err)) {
-        goto error;
-    }
-
-    _PyPathConfig_Clear(&path_config);
    _PyCoreConfig_Clear(&config);
    return;

error:
-    _PyPathConfig_Clear(&path_config);
    _PyCoreConfig_Clear(&config);
    _Py_FatalInitError(err);
}