detect active venv

Signed-off-by: vladmandic <mandic00@live.com>

CHANGELOG.md

@@ -1,8 +1,8 @@
 # Change Log for SD.Next
 
-## Update for 2026-03-26
+## Update for 2026-03-27
 
-### Highlights for 2026-03-26
+### Highlights for 2026-03-27
 
 This release brings massive code refactoring to modernize codebase and removal of some obsolete features. Leaner & Faster!  
 And since its a bit quieter period when it comes to new models, notable additions would be : *FireRed-Image-Edit*, *SkyWorks-UniPic-3* and new versions of *Anima-Preview*, *Flux-Klein-KV*  
@@ -18,7 +18,7 @@ But also many smaller quality-of-life improvements - for full details, see [Chan
 
 [ReadMe](https://github.com/vladmandic/automatic/blob/master/README.md) | [ChangeLog](https://github.com/vladmandic/automatic/blob/master/CHANGELOG.md) | [Docs](https://vladmandic.github.io/sdnext-docs/) | [WiKi](https://github.com/vladmandic/automatic/wiki) | [Discord](https://discord.com/invite/sd-next-federal-batch-inspectors-1101998836328697867) | [Sponsor](https://github.com/sponsors/vladmandic)  
 
-### Details for 2026-03-26
+### Details for 2026-03-27
 
 - **Models**
   - [Google Flash 3.1 Image](https://ai.google.dev/gemini-api/docs/models/gemini-3-flash-preview) a.k.a. *Nano Banana 2*  
@@ -141,6 +141,7 @@ But also many smaller quality-of-life improvements - for full details, see [Chan
   - better subprocess execute, thanks @awsr  
   - better wslopen handling, thanks @awsr  
   - refactor for PEP-484 compliance, thanks @awsr  
+  - detect active `venv`  
 - **Obsolete**
   - remove `normalbae` pre-processor  
   - remove `dwpose` pre-processor  

installer.py

@@ -440,6 +440,8 @@ def check_python(supported_minors=None, experimental_minors=None, reason=None):
     if args.quick:
         return
     log.info(f'Python: version={platform.python_version()} platform={platform.system()} bin="{sys.executable}" venv="{sys.prefix}"')
+    if sys.prefix == getattr(sys, "base_prefix", sys.prefix) and 'venv' not in sys.prefix.lower():
+        log.warning('Python: virtual environment not detected')
     if int(sys.version_info.minor) == 9:
         log.error(f"Python: version={platform.python_version()} is end-of-life")
     if int(sys.version_info.minor) == 10:
@@ -1000,6 +1002,19 @@ def list_extensions_folder(folder, quiet=False):
 
 # run installer for each installed and enabled extension and optionally update them
 def install_extensions(force=False):
+    disable_diffusers = [
+        'sd-webui-controlnet',
+        'multidiffusion-upscaler-for-automatic1111',
+        'a1111-sd-webui-lycoris',
+        'sd-webui-animatediff',
+    ]
+    disable_obsolete = [
+        'Lora',
+        'stable-diffusion-webui-rembg',
+        'sd-extension-framepack',
+        'sd-extension-nudenet',
+        'sd-extension-promptgen',
+    ]
     if args.profile:
         pr = cProfile.Profile()
         pr.enable()
@@ -1009,6 +1024,12 @@ def install_extensions(force=False):
     extensions_duplicates = []
     extensions_enabled = []
     extensions_disabled = [e.lower() for e in opts.get('disabled_extensions', [])]
+    for ext in disable_diffusers:
+        if ext.lower() not in opts.get('disabled_extensions', []):
+            extensions_disabled.append(ext)
+    for ext in disable_obsolete:
+        if ext.lower() not in opts.get('disabled_extensions', []):
+            extensions_disabled.append(ext)
     extension_folders = [extensions_builtin_dir] if args.safe else [extensions_builtin_dir, extensions_dir]
     res = []
     for folder in extension_folders: