Error when precompiling packages that rely on PythonCall

opsssi · September 14, 2025, 3:03pm

Hi!

I have a problem when trying to use the Package OptimizationSciPy.jl (and I got the same error previously when trying to install other packages that require PythonCall.

versioninfo

Julia Version 1.11.6
Commit 9615af0f26 (2025-07-09 12:58 UTC)
Build Info:
  Official https://julialang.org/ release
Platform Info:
  OS: Windows (x86_64-w64-mingw32)
  CPU: 14 × Intel(R) Core(TM) Ultra 7 165U
  WORD_SIZE: 64
  LLVM: libLLVM-16.0.6 (ORCJIT, alderlake)
Threads: 1 default, 0 interactive, 1 GC (on 14 virtual cores)
Environment:
  JULIA_EDITOR = code
  JULIA_VSCODE_REPL = 1

]add OptimizationSciPy

julia> Pkg.add("OptimizationSciPy")
   Resolving package versions...
  No Changes to `C:\Users\INIT\.julia\environments\v1.11\Project.toml`
  No Changes to `C:\Users\INIT\.julia\environments\v1.11\Manifest.toml`
Precompiling project...
  ✗ SciMLBase → SciMLBasePythonCallExt
  ✗ OptimizationSciPy
  0 dependencies successfully precompiled in 155 seconds. 676 already precompiled.
  2 dependencies errored.
  For a report of the errors see `julia> err`. To retry use `pkg> precompile`

err


PkgPrecompileError: The following 1 direct dependency failed to precompile:

OptimizationSciPy 

Failed to precompile OptimizationSciPy [cce07bd8-c79b-4b00-aee8-8db9cce22837] to "C:\\Users\\INIT\\.julia\\compiled\\v1.11\\OptimizationSciPy\\jl_257A.tmp".
    CondaPkg Found dependencies: C:\Users\INIT\.julia\packages\PythonCall\IOKTD\CondaPkg.toml
    CondaPkg Found dependencies: C:\Users\INIT\.julia\packages\OptimizationSciPy\0QVwM\CondaPkg.toml
    CondaPkg Resolving changes
             + numpy
             + openssl
             + python
             + scipy
    CondaPkg Initialising pixi
             │ C:\Users\INIT\.julia\artifacts\aa881b8313f97d7b8797934574a1cfe551f85222\bin\pixi.exe
             │ init
             │ --format pixi
             └ C:\Users\INIT\.julia\environments\v1.11\.CondaPkg
Created C:\Users\INIT\.julia\environments\v1.11\.CondaPkg\pixi.toml
    CondaPkg Wrote C:\Users\INIT\.julia\environments\v1.11\.CondaPkg\pixi.toml
             │ [dependencies]
             │ openssl = ">=3, <3.6"
             │ numpy = "*"
             │ scipy = "*"
             │
             │     [dependencies.python]
             │     channel = "conda-forge"
             │     build = "*cp*"
             │     version = ">=3.9,<4"
             │
             │ [project]
             │ name = ".CondaPkg"
             │ platforms = ["win-64"]
             │ channels = ["conda-forge"]
             │ channel-priority = "strict"
             └ description = "automatically generated by CondaPkg.jl"
    CondaPkg Installing packages
             │ C:\Users\INIT\.julia\artifacts\aa881b8313f97d7b8797934574a1cfe551f85222\bin\pixi.exe
             │ install
             └ --manifest-path C:\Users\INIT\.julia\environments\v1.11\.CondaPkg\pixi.toml
Error:
  × EOF while parsing a value at line 1 column 0

ERROR: LoadError: InitError: failed process: Process(setenv(`'C:\Users\INIT\.julia\artifacts\aa881b8313f97d7b8797934574a1cfe551f85222\bin\pixi.exe' install --manifest-path 'C:\Users\INIT\.julia\environments\v1.11\.CondaPkg\pixi.toml'`,["PATH=C:\\Users\\INIT\\.julia\\juliaup\\julia-1.11.6+0.x64.w64.mingw32\\bin\\..\\lib\\julia;C:\\Users\\INIT\\.julia\\juliaup\\julia-1.11.6+0.x64.w64.mingw32\\bin\\..\\lib;C:\\Users\\INIT\\.julia\\juliaup\\julia-1.11.6+0.x64.w64.mingw32\\bin;C:\\Windows\\system32;C:\\Windows;C:\\Windows\\System32\\Wbem;C:\\Windows\\System32\\WindowsPowerShell\\v1.0\\;C:\\Windows\\System32\\OpenSSH\\;C:\\Program Files\\1E\\Client\\Extensibility\\NomadBranch;C:\\Users\\INIT\\AppData\\Local\\Microsoft\\WindowsApps;C:\\Users\\INIT\\AppData\\Local\\Programs\\Microsoft VS Code\\bin;C:\\Users\\INIT\\AppData\\Local\\Programs\\Git\\cmd;C:\\isis21\\oracle\\ora19.8_64bit\\bin;C:\\isis21\\oracle\\ora19.8_32bit\\bin", "USERDOMAIN_ROAMINGPROFILE=CORP", "HOMEPATH=\\Users\\INIT", "PATHEXT=.COM;.EXE;.BAT;.CMD;.VBS;.VBE;.JS;.JSE;.WSF;.WSH;.MSC", "SESSIONNAME=Console", "VSCODE_NONCE=d08453c4-c171-44db-ae9f-794bb5052675", "SYSTEMROOT=C:\\Windows", "APPDATA=C:\\Users\\INIT\\AppData\\Roaming", "PSMODULEPATH=C:\\Program Files\\WindowsPowerShell\\Modules;C:\\Windows\\system32\\WindowsPowerShell\\v1.0\\Modules", "COMMONPROGRAMW6432=C:\\Program Files\\Common Files"  …  "PROGRAMFILES=C:\\Program Files", "CHROME_CRASHPAD_PIPE_NAME=\\\\.\\pipe\\crashpad_20316_LWLJQUZYUTLQVPSN", "LOGONSERVER=\\\\PF5ELQ9P", "DRIVERDATA=C:\\Windows\\System32\\Drivers\\DriverData", "ORIGINAL_XDG_CURRENT_DESKTOP=undefined", "JULIA_LOAD_PATH=C:\\Users\\INIT\\.julia\\environments\\v1.11\\Project.toml;C:\\Users\\INIT\\.julia\\juliaup\\julia-1.11.6+0.x64.w64.mingw32\\share\\julia\\stdlib\\v1.11", "SYSTEMDRIVE=C:", "__COMPAT_LAYER=DetectorsAppHealth", "PROCESSOR_ARCHITECTURE=AMD64", "OPENBLAS_MAIN_FREE=1"]), ProcessExited(1)) [1]

Stacktrace:
  [1] pipeline_error
    @ .\process.jl:598 [inlined]
  [2] run(::Cmd; wait::Bool)
    @ Base .\process.jl:513
  [3] run(::Cmd)
    @ Base .\process.jl:510
  [4] _run(io::IO, cmd::Cmd, args::Any; flags::Any)
    @ CondaPkg C:\Users\INIT\.julia\packages\CondaPkg\JnPvc\src\resolve.jl:761
  [5] _run(io::IO, cmd::Cmd, args::Any)
    @ CondaPkg C:\Users\INIT\.julia\packages\CondaPkg\JnPvc\src\resolve.jl:755
  [6] (::CondaPkg.var"#72#81"{Bool, IOContext{Base.PipeEndpoint}, String, Vector{CondaPkg.PipPkgSpec}, Vector{CondaPkg.PkgSpec}, Vector{CondaPkg.ChannelSpec}})()
    @ CondaPkg C:\Users\INIT\.julia\packages\CondaPkg\JnPvc\src\resolve.jl:1053
  [7] cd(f::CondaPkg.var"#72#81"{Bool, IOContext{Base.PipeEndpoint}, String, Vector{CondaPkg.PipPkgSpec}, Vector{CondaPkg.PkgSpec}, Vector{CondaPkg.ChannelSpec}}, dir::String)
    @ Base.Filesystem .\file.jl:101
  [8] resolve(; force::Bool, io::IO, interactive::Bool, dry_run::Bool)
    @ CondaPkg C:\Users\INIT\.julia\packages\CondaPkg\JnPvc\src\resolve.jl:986
  [9] resolve()
    @ CondaPkg C:\Users\INIT\.julia\packages\CondaPkg\JnPvc\src\resolve.jl:764
 [10] envdir()
    @ CondaPkg C:\Users\INIT\.julia\packages\CondaPkg\JnPvc\src\env.jl:70
 [11] init_context()
    @ PythonCall.C C:\Users\INIT\.julia\packages\PythonCall\IOKTD\src\C\context.jl:63
 [12] __init__()
    @ PythonCall.C C:\Users\INIT\.julia\packages\PythonCall\IOKTD\src\C\C.jl:26
 [13] run_module_init(mod::Module, i::Int64)
    @ Base .\loading.jl:1378
 [14] register_restored_modules(sv::Core.SimpleVector, pkg::Base.PkgId, path::String)
    @ Base .\loading.jl:1366
 [15] _include_from_serialized(pkg::Base.PkgId, path::String, ocachepath::String, depmods::Vector{Any}, ignore_native::Nothing; register::Bool)
    @ Base .\loading.jl:1254
 [16] _include_from_serialized (repeats 2 times)
    @ .\loading.jl:1210 [inlined]
 [17] _require_search_from_serialized(pkg::Base.PkgId, sourcepath::String, build_id::UInt128, stalecheck::Bool;
 reasons::Dict{String, Int64}, DEPOT_PATH::Vector{String})
    @ Base .\loading.jl:2057
 [18] _require(pkg::Base.PkgId, env::String)
    @ Base .\loading.jl:2527
 [19] __require_prelocked(uuidkey::Base.PkgId, env::String)
    @ Base .\loading.jl:2388
 [20] #invoke_in_world#3
    @ .\essentials.jl:1089 [inlined]
 [21] invoke_in_world
    @ .\essentials.jl:1086 [inlined]
 [22] _require_prelocked(uuidkey::Base.PkgId, env::String)
    @ Base .\loading.jl:2375
 [23] macro expansion
    @ .\loading.jl:2314 [inlined]
 [24] macro expansion
    @ .\lock.jl:273 [inlined]
 [25] __require(into::Module, mod::Symbol)
    @ Base .\loading.jl:2271
 [26] #invoke_in_world#3
    @ .\essentials.jl:1089 [inlined]
 [27] invoke_in_world
    @ .\essentials.jl:1086 [inlined]
 [28] require(into::Module, mod::Symbol)
    @ Base .\loading.jl:2260
 [29] include
    @ .\Base.jl:562 [inlined]
 [30] include_package_for_output(pkg::Base.PkgId, input::String, depot_path::Vector{String}, dl_load_path::Vector{String}, load_path::Vector{String}, concrete_deps::Vector{Pair{Base.PkgId, UInt128}}, source::Nothing)      
    @ Base .\loading.jl:2881
 [31] top-level scope
    @ stdin:6
during initialization of module C
in expression starting at C:\Users\INIT\.julia\packages\OptimizationSciPy\0QVwM\src\OptimizationSciPy.jl:2     
in expression starting at stdin:

What I tried so far:

Update all packages
Removed and reinstalled OptimizationSciPy.jl, Conda.jl
]build PyCall
Deleted the subdirectories of the error message: C:\Users\INIT.julia\artifacts\aa881b8313f97d7b8797934574a1cfe551f85222 and C:\Users\INIT.julia\environments\v1.11.CondaPkg\

After the last point, I actually got a different error message:

err

PkgPrecompileError: The following 1 direct dependency failed to precompile:

OptimizationSciPy

Failed to precompile OptimizationSciPy [cce07bd8-c79b-4b00-aee8-8db9cce22837] to "C:\\Users\\INIT\\.julia\\compiled\\v1.11\\OptimizationSciPy\\jl_BA24.tmp".
    CondaPkg Found dependencies: C:\Users\INIT\.julia\packages\PythonCall\IOKTD\CondaPkg.toml
    CondaPkg Found dependencies: C:\Users\INIT\.julia\packages\OptimizationSciPy\0QVwM\CondaPkg.toml
    CondaPkg Resolving changes
             + numpy
             + openssl
             + python
             + scipy
    CondaPkg Initialising pixi
             │ C:\Users\INIT\.julia\artifacts\aa881b8313f97d7b8797934574a1cfe551f85222\bin\pixi.exe
             │ init
             │ --format pixi
             └ C:\Users\INIT\.julia\environments\v1.11\.CondaPkg
Created C:\Users\INIT\.julia\environments\v1.11\.CondaPkg\pixi.toml
    CondaPkg Wrote C:\Users\INIT\.julia\environments\v1.11\.CondaPkg\pixi.toml
             │ [dependencies]
             │ openssl = ">=3, <3.6"
             │ numpy = "*"
             │ scipy = "*"
             │
             │     [dependencies.python]
             │     channel = "conda-forge"
             │     build = "*cp*"
             │     version = ">=3.9,<4"
             │
             │ [project]
             │ name = ".CondaPkg"
             │ platforms = ["win-64"]
             │ channels = ["conda-forge"]
             │ channel-priority = "strict"
             └ description = "automatically generated by CondaPkg.jl"
    CondaPkg Installing packages
             │ C:\Users\INIT\.julia\artifacts\aa881b8313f97d7b8797934574a1cfe551f85222\bin\pixi.exe
             │ install
             └ --manifest-path C:\Users\INIT\.julia\environments\v1.11\.CondaPkg\pixi.toml
Error:
  × Failed to run activation script for Default. Status: exit code: 1.
  │ Stdout: . Stderr: This program is blocked by group policy. For more
  │ information, contact your system administrator.
  │ . Script: @chcp 65001 > nul
  │ @SET
  │ @ECHO ____RATTLER_ENV_START____
  │
  │ @SET "Path=C:
  │ \Users\INIT\.julia\environments\v1.11\.CondaPkg\.pixi\envs\default;C:
  │ \Users\INIT\.julia\environments\v1.11\.CondaPkg\.pixi\envs\default\Library
  │ /mingw-w64/bin;C:
  │ \Users\INIT\.julia\environments\v1.11\.CondaPkg\.pixi\envs\default\Library
  │ /usr/bin;C:
  │ \Users\INIT\.julia\environments\v1.11\.CondaPkg\.pixi\envs\default\Library
  │ /bin;C:
  │ \Users\INIT\.julia\environments\v1.11\.CondaPkg\.pixi\envs\default\Scripts
  │ ;C:\Users\INIT\.julia\environments\v1.11\.CondaPkg\.pixi\envs\default\bin;
  │ %Path%"
  │ @SET "CONDA_PREFIX=C:
  │ \Users\INIT\.julia\environments\v1.11\.CondaPkg\.pixi\envs\default"
  │ @SET "PIXI_PROJECT_MANIFEST=C:
  │ \Users\INIT\.julia\environments\v1.11\.CondaPkg\pixi.toml"
  │ @SET "PIXI_EXE=C:
  │ \Users\INIT\.julia\artifacts\aa881b8313f97d7b8797934574a1cfe551f85222\bin\
  │ pixi.exe"
  │ @SET "PIXI_PROJECT_ROOT=C:\Users\INIT\.julia\environments\v1.11\.CondaPkg"
  │ @SET "PIXI_PROJECT_VERSION=NO_VERSION_SPECIFIED"
  │ @SET "PIXI_IN_SHELL=1"
  │ @SET "PIXI_PROJECT_NAME=.CondaPkg"
  │ @SET "CONDA_DEFAULT_ENV=.CondaPkg"
  │ @SET "PIXI_ENVIRONMENT_NAME=default"
  │ @SET "PIXI_ENVIRONMENT_PLATFORMS=win-64"
  │ @SET "PIXI_PROMPT=(.CondaPkg) "
  │ @CALL "C:
  │ \Users\INIT\.julia\environments\v1.11\.CondaPkg\.pixi\envs\default\etc/
  │ conda/activate.d\libxml2-split_activate.bat"
  │ @CALL "C:
  │ \Users\INIT\.julia\environments\v1.11\.CondaPkg\.pixi\envs\default\etc/
  │ conda/activate.d\openssl_activate-win.bat"
  │ @ECHO ____RATTLER_ENV_START____
  │ @SET
  │

ERROR: LoadError: InitError: failed process: Process(setenv(`'C:\Users\INIT\.julia\artifacts\aa881b8313f97d7b8797934574a1cfe551f85222\bin\pixi.exe' install --manifest-path 'C:\Users\INIT\.julia\environments\v1.11\.CondaPkg\pixi.toml'`,["PATH=C:\\Users\\INIT\\.julia\\juliaup\\julia-1.11.6+0.x64.w64.mingw32\\bin\\..\\lib\\julia;C:\\Users\\INIT\\.julia\\juliaup\\julia-1.11.6+0.x64.w64.mingw32\\bin\\..\\lib;C:\\Users\\INIT\\.julia\\juliaup\\julia-1.11.6+0.x64.w64.mingw32\\bin;C:\\Windows\\system32;C:\\Windows;C:\\Windows\\System32\\Wbem;C:\\Windows\\System32\\WindowsPowerShell\\v1.0\\;C:\\Windows\\System32\\OpenSSH\\;C:\\Program Files\\1E\\Client\\Extensibility\\NomadBranch;C:\\Users\\INIT\\AppData\\Local\\Microsoft\\WindowsApps;C:\\Users\\INIT\\AppData\\Local\\Programs\\Microsoft VS Code\\bin;C:\\Users\\INIT\\AppData\\Local\\Programs\\Git\\cmd;C:\\isis21\\oracle\\ora19.8_64bit\\bin;C:\\isis21\\oracle\\ora19.8_32bit\\bin", "USERDOMAIN_ROAMINGPROFILE=CORP", "HOMEPATH=\\Users\\INIT", "PATHEXT=.COM;.EXE;.BAT;.CMD;.VBS;.VBE;.JS;.JSE;.WSF;.WSH;.MSC", "SESSIONNAME=Console", "VSCODE_NONCE=d08453c4-c171-44db-ae9f-794bb5052675", "SYSTEMROOT=C:\\Windows", "APPDATA=C:\\Users\\INIT\\AppData\\Roaming", "PSMODULEPATH=C:\\Program Files\\WindowsPowerShell\\Modules;C:\\Windows\\system32\\WindowsPowerShell\\v1.0\\Modules", "COMMONPROGRAMW6432=C:\\Program Files\\Common Files"  …  "PROGRAMFILES=C:\\Program Files", "CHROME_CRASHPAD_PIPE_NAME=\\\\.\\pipe\\crashpad_20316_LWLJQUZYUTLQVPSN", "LOGONSERVER=\\\\PF5ELQ9P", "DRIVERDATA=C:\\Windows\\System32\\Drivers\\DriverData", "ORIGINAL_XDG_CURRENT_DESKTOP=undefined", "JULIA_LOAD_PATH=C:\\Users\\INIT\\.julia\\environments\\v1.11\\Project.toml;C:\\Users\\INIT\\.julia\\juliaup\\julia-1.11.6+0.x64.w64.mingw32\\share\\julia\\stdlib\\v1.11", "SYSTEMDRIVE=C:", "__COMPAT_LAYER=DetectorsAppHealth", "PROCESSOR_ARCHITECTURE=AMD64", "OPENBLAS_MAIN_FREE=1"]), ProcessExited(1)) [1]

Stacktrace:
  [1] pipeline_error
    @ .\process.jl:598 [inlined]
  [2] run(::Cmd; wait::Bool)
    @ Base .\process.jl:513
  [3] run(::Cmd)
    @ Base .\process.jl:510
  [4] _run(io::IO, cmd::Cmd, args::Any; flags::Any)
    @ CondaPkg C:\Users\INIT\.julia\packages\CondaPkg\JnPvc\src\resolve.jl:761
  [5] _run(io::IO, cmd::Cmd, args::Any)
    @ CondaPkg C:\Users\INIT\.julia\packages\CondaPkg\JnPvc\src\resolve.jl:755
  [6] (::CondaPkg.var"#72#81"{Bool, IOContext{Base.PipeEndpoint}, String, Vector{CondaPkg.PipPkgSpec}, Vector{CondaPkg.PkgSpec}, Vector{CondaPkg.ChannelSpec}})()
    @ CondaPkg C:\Users\INIT\.julia\packages\CondaPkg\JnPvc\src\resolve.jl:1053
  [7] cd(f::CondaPkg.var"#72#81"{Bool, IOContext{Base.PipeEndpoint}, String, Vector{CondaPkg.PipPkgSpec}, Vector{CondaPkg.PkgSpec}, Vector{CondaPkg.ChannelSpec}}, dir::String)
    @ Base.Filesystem .\file.jl:101
  [8] resolve(; force::Bool, io::IO, interactive::Bool, dry_run::Bool)
    @ CondaPkg C:\Users\INIT\.julia\packages\CondaPkg\JnPvc\src\resolve.jl:986
  [9] resolve()
    @ CondaPkg C:\Users\INIT\.julia\packages\CondaPkg\JnPvc\src\resolve.jl:764
 [10] envdir()
    @ CondaPkg C:\Users\INIT\.julia\packages\CondaPkg\JnPvc\src\env.jl:70
 [11] init_context()
    @ PythonCall.C C:\Users\INIT\.julia\packages\PythonCall\IOKTD\src\C\context.jl:63
 [12] __init__()
    @ PythonCall.C C:\Users\INIT\.julia\packages\PythonCall\IOKTD\src\C\C.jl:26
 [13] run_module_init(mod::Module, i::Int64)
    @ Base .\loading.jl:1378
 [14] register_restored_modules(sv::Core.SimpleVector, pkg::Base.PkgId, path::String)
    @ Base .\loading.jl:1366
 [15] _include_from_serialized(pkg::Base.PkgId, path::String, ocachepath::String, depmods::Vector{Any}, ignore_native::Nothing; register::Bool)
    @ Base .\loading.jl:1254
 [16] _include_from_serialized (repeats 2 times)
    @ .\loading.jl:1210 [inlined]
 [17] _require_search_from_serialized(pkg::Base.PkgId, sourcepath::String, build_id::UInt128, stalecheck::Bool;
 reasons::Dict{String, Int64}, DEPOT_PATH::Vector{String})
    @ Base .\loading.jl:2057
 [18] _require(pkg::Base.PkgId, env::String)
    @ Base .\loading.jl:2527
 [19] __require_prelocked(uuidkey::Base.PkgId, env::String)
    @ Base .\loading.jl:2388
 [20] #invoke_in_world#3
    @ .\essentials.jl:1089 [inlined]
 [21] invoke_in_world
    @ .\essentials.jl:1086 [inlined]
 [22] _require_prelocked(uuidkey::Base.PkgId, env::String)
    @ Base .\loading.jl:2375
 [23] macro expansion
    @ .\loading.jl:2314 [inlined]
 [24] macro expansion
    @ .\lock.jl:273 [inlined]
 [25] __require(into::Module, mod::Symbol)
    @ Base .\loading.jl:2271
 [26] #invoke_in_world#3
    @ .\essentials.jl:1089 [inlined]
 [27] invoke_in_world
    @ .\essentials.jl:1086 [inlined]
 [28] require(into::Module, mod::Symbol)
    @ Base .\loading.jl:2260
 [29] include
    @ .\Base.jl:562 [inlined]
 [30] include_package_for_output(pkg::Base.PkgId, input::String, depot_path::Vector{String}, dl_load_path::Vector{String}, load_path::Vector{String}, concrete_deps::Vector{Pair{Base.PkgId, UInt128}}, source::Nothing)      
    @ Base .\loading.jl:2881
 [31] top-level scope
    @ stdin:6
during initialization of module C
in expression starting at C:\Users\INIT\.julia\packages\OptimizationSciPy\0QVwM\src\OptimizationSciPy.jl:2     
in expression starting at stdin:

I cannot run anything that requires admin rights (“This program is blocked by group policy…” (?) and so far it has not been an issue). So any advise other than that would be appreciated

Thank you.

opsssi · September 14, 2025, 5:21pm

Update: I got rid of this issue now.
If anyone else has this problem, I solved it in the following way (probably not the best way but it worked )

I don’t know if all of these steps are actually necessary but here we go:

Since the error message suggested some issue with the pixi backend of CondaPkg (see JuliaPy/CondaPkg.jl: Add Conda dependencies to your Julia project), I switched the backend to MicroMamba:

]add PreferenceTools
]add MicroMamba
using PreferenceTools
]preference add CondaPkg backend=MicroMamba

After restarting julia, it still seemed to use the pixi backend for some reason and the error persisted. I then tried the brute force way of removing Conda completely, deleting both, the directory
C:\Users\INIT.julia\environments\v1.11.CondaPkg
and C:\Users\INIT.julia\conda and running

]rm Conda
]rm CondaPkg
]add CondaPkg

After this, I was able to successfully use the OptimizationSciPy package.

Benny · September 14, 2025, 5:24pm

PyCall is an unrelated package and not in any of your error messages. Change your title and tags to PythonCall, that’s the actual dependency and should be stated to draw the right attention to the pixi backend issue. You should keep the ]build PyCall step and acknowledge it was a mistake, it could have affected the process.

cjdoris · September 14, 2025, 9:36pm

No idea what the underlying issue was but I’m guessing something in the .CondaPkg folder got corrupted somehow.

Deleting .CondaPkg is fine provided Julia is not running, it will be recreated next time you use PythonCall.

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