# Lambda stack installation error

**URL:** <https://deeptalk.lambda.ai/t/lambda-stack-installation-error/1277>\
**Category:** Uncategorized\
**Created:** [November 8, 2019, 5:38pm UTC](https://deeptalk.lambda.ai/t/lambda-stack-installation-error/1277 "2019-11-08T17:38:35Z")\
**Posts on this page:** 1\
**Showing post:** 4

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**Author:** ![lambda](https://sea1.discourse-cdn.com/flex019/user_avatar/deeptalk.lambda.ai/lambda/32/599_2.png) [@lambda](https://deeptalk.lambda.ai/u/lambda)\
**Post date:** [May 13, 2020, 9:04pm UTC](https://deeptalk.lambda.ai/t/lambda-stack-installation-error/1277/4 "2020-05-13T21:04:55Z")

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I ran into the same issue with the nvidia-cudnn file. Here’s how to get around this (or other signature problems):  
1.) Open a web browser and paste the URL ending .deb  
2.) Save the file to your computer  
3.) You can now either double-click and install using Ubuntu’s software manager -or- install the .deb from command line

Lambda redefines “dependency nightmare” ☹

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