# Conda.add("numpy") fails

**URL:** <https://discourse.julialang.org/t/conda-add-numpy-fails/95765>\
**Category:** New to Julia\
**Created:** [March 8, 2023, 8:33pm UTC](https://discourse.julialang.org/t/conda-add-numpy-fails/95765 "2023-03-08T20:33:44Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![flvegat](https://avatars.discourse-cdn.com/v4/letter/f/bbe5ce/32.png) [@flvegat](https://discourse.julialang.org/u/flvegat)\
**Post date:** [March 8, 2023, 8:33pm UTC](https://discourse.julialang.org/t/conda-add-numpy-fails/95765/1 "2023-03-08T20:33:44Z")

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from [Julia is fast! | JuliaAcademy](https://juliaacademy.com/courses/375479/lectures/5863644)  
trying too run “9 Julia is fast.ipynb”  
had to add  
ENV[“PYTHON”] = “c:/Users//anaconda3/python.exe”  
to cell 30.  
cell 37 fails  
using Pkg; Pkg.add(“Conda”)  
using Conda  
Conda.add(“numpy”) # cell 37

failed process: Process(`'C:\Users\<username>\AppData\Local\Temp\installer.exe' /S --no-shortcuts /NoRegistry=1 /AddToPath=0 /RegisterPython=0 '/D=C:\Users\camar\.julia\conda\3'`, ProcessExited(2)) [2]

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<div class="post-metadata">

**Author:** ![sjkelly](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/sjkelly/32/9280_2.png) [@sjkelly](https://discourse.julialang.org/u/sjkelly)\
**Post date:** [March 8, 2023, 10:57pm UTC](https://discourse.julialang.org/t/conda-add-numpy-fails/95765/2 "2023-03-08T22:57:52Z")

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Usually:

```julia
ENV[“PYTHON”] = ""
Pkg.build("PyCall")

```

Will sort out a Conda install.

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<div class="post-metadata">

**Author:** ![stevengj](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/stevengj/32/71_2.png) [@stevengj](https://discourse.julialang.org/u/stevengj)\
**Post date:** [March 8, 2023, 11:26pm UTC](https://discourse.julialang.org/t/conda-add-numpy-fails/95765/3 "2023-03-08T23:26:49Z")

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Note that you have to restart Julia after re-building PyCall

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<div class="post-metadata">

**Author:** ![flvegat](https://avatars.discourse-cdn.com/v4/letter/f/bbe5ce/32.png) [@flvegat](https://discourse.julialang.org/u/flvegat)\
**Post date:** [March 9, 2023, 1:42am UTC](https://discourse.julialang.org/t/conda-add-numpy-fails/95765/4 "2023-03-09T01:42:14Z")

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The notebook is here [Introduction-to-Julia/9 - Julia is fast.ipynb at main · JuliaAcademy/Introduction-to-Julia · GitHub](https://github.com/JuliaAcademy/Introduction-to-Julia/blob/main/9%20-%20Julia%20is%20fast.ipynb) Neither ENV[“PYTHON”] = “” or restarting after building PyCall worked, got the same error.