fix: re-add --pre to allow dev builds support; re-add custom_platform

Author: Creeper19472

src/serious_python/bin/package_command.dart

@@ -18,8 +18,8 @@ const mobilePyPiUrl = "https://pypi.flet.dev";
 const pyodideRootUrl = "https://cdn.jsdelivr.net/pyodide/v0.27.7/full";
 const pyodideLockFile = "pyodide-lock.json";
 
-const buildPythonVersion = "3.14.2";
-const buildPythonReleaseDate = "20251209";
+const buildPythonVersion = "3.14.3";
+const buildPythonReleaseDate = "20260203";
 const defaultSitePackagesDir = "__pypackages__";
 const sitePackagesEnvironmentVariable = "SERIOUS_PYTHON_SITE_PACKAGES";
 const flutterPackagesFlutterEnvironmentVariable =
@@ -359,7 +359,7 @@ class PackageCommand extends Command {
               '-m',
               'pip',
               'install',
-              // '--pre',
+              '--pre',
               '--upgrade',
               ...pipArgs,
               '--target',

src/serious_python/bin/sitecustomize.dart

@@ -3,7 +3,7 @@ String sitecustomizePy = """
 # The folder containing this file should be on your PYTHONPATH pip is invoked.
 
 custom_system = "{platform}"
-#custom_platform = "{tag}"
+custom_platform = "{tag}"
 custom_mac_ver = "{mac_ver}"
 
 import collections
@@ -14,8 +14,8 @@ import sys
 if custom_system:
     platform.system = lambda: custom_system
 
-#if custom_platform:
-#    sysconfig.get_platform = lambda: custom_platform
+if custom_platform:
+    sysconfig.get_platform = lambda: custom_platform
 
 if custom_mac_ver:
   orig_mac_ver = platform.mac_ver
@@ -43,4 +43,4 @@ if custom_system == "iOS":
 
 orig_platform_version = platform.version
 platform.version = lambda: orig_platform_version() + ";embedded"
-""";
+""";