Could not find C standard library #127

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1. anhvietnguyennva commented on Mar 3, 2026

   

   anhvietnguyennva

   on Mar 3, 2026

   Last edited by anhvietnguyennva

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   In the README.md, it requries Python 3.8+. However, from Python 3.8 onwards, ctypes.util.find_msvcrt() always returns None.
2. biberhund commented on Mar 6, 2026

   

   biberhund

   on Mar 6, 2026

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   Same issue, Python3.12, Win11
3. 0xsagashi commented on Mar 12, 2026

   

   0xsagashi

   on Mar 12, 2026

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   Hi @biberhund @anhvietnguyennva ,
   Same issue here.
   Resolved by downgrading the SDK from 1.0.6 to 1.0.3. (Ty BlazeFury)
   Also make sure to have your VC_redist installed, and your Path updated.

   Windows 10 - Python 3.11
4. DoganM95 commented on Mar 13, 2026

   

   DoganM95

   on Mar 13, 2026

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   Same here. On windows it says

   in get_libc raise RuntimeError("Could not find C standard library")
   

   But on linux it works just fine.
5. DoganM95 commented on Mar 13, 2026

   

   DoganM95

   on Mar 13, 2026

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   0xsacha from lighter discord recommended downgrading to 1.0.3 and it works on windows without trowing the C lib error:

   pip install --upgrade --force-reinstall git+https://github.com/elliottech/lighter-python.git@v1.0.3

   To the devs, please fix this with the next update, since any version above 1.0.3 is broken in this regard.
6. anhvietnguyennva commented on Mar 15, 2026

   

   anhvietnguyennva

   on Mar 15, 2026

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   I need staking/unstaking in the new release version, so can not downgrade to 1.0.3. Please fix it devs