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hb_ft_font_get_ft_face error from CondaPkg installation #55
Description
On a fresh install of julia and PythonPlot i get the following error when trying to load it:
CondaPkg Found dependencies: /home/anton/.julia/packages/CondaPkg/lKlVY/CondaPkg.toml
CondaPkg Found dependencies: /home/anton/.julia/packages/PythonCall/5WGSP/CondaPkg.toml
CondaPkg Found dependencies: /home/anton/.julia/packages/PythonPlot/oS8x4/CondaPkg.toml
CondaPkg Resolving changes
+ libstdcxx
+ libstdcxx-ng
+ matplotlib
+ openssl
+ python
CondaPkg Initialising pixi
│ /home/anton/.julia/artifacts/4ae17cee0bd922f66b2c72bf2f01c22481a5ec19/bin/pixi
│ init
│ --format pixi
└ /home/anton/.julia/environments/v1.12/.CondaPkg
✔ Created /home/anton/.julia/environments/v1.12/.CondaPkg/pixi.toml
CondaPkg Wrote /home/anton/.julia/environments/v1.12/.CondaPkg/pixi.toml
│ [dependencies]
│ openssl = ">=3, <3.6"
│ libstdcxx = ">=3.4,<15.0"
│ libstdcxx-ng = ">=3.4,<15.0"
│ matplotlib = ">=1"
│
│ [dependencies.python]
│ channel = "conda-forge"
│ build = "*cp*"
│ version = ">=3.10,!=3.14.0,!=3.14.1,<4"
│
│ [workspace]
│ name = ".CondaPkg"
│ platforms = ["linux-64"]
│ channels = ["conda-forge"]
│ channel-priority = "strict"
└ description = "automatically generated by CondaPkg.jl"
CondaPkg Installing packages
│ /home/anton/.julia/artifacts/4ae17cee0bd922f66b2c72bf2f01c22481a5ec19/bin/pixi
│ install
└ --manifest-path /home/anton/.julia/environments/v1.12/.CondaPkg/pixi.toml
✔ The default environment has been installed.
ERROR: LoadError: InitError: Python: ImportError: /home/anton/.julia/environments/v1.12/.CondaPkg/.pixi/envs/default/lib/python3.14/site-packages/matplotlib/../../../libraqm.so.0: undefined symbol: hb_ft_font_get_ft_face
Python stacktrace:
[1] _check_versions
@ ~/.julia/environments/v1.12/.CondaPkg/.pixi/envs/default/lib/python3.14/site-packages/matplotlib/__init__.py:250
[2] <module>
@ ~/.julia/environments/v1.12/.CondaPkg/.pixi/envs/default/lib/python3.14/site-packages/matplotlib/__init__.py:265
during initialization of module PythonPlot
in expression starting at /home/anton/syscop/software/CCOptExperiments.jl/scripts/common.jl:10
Stacktrace:
[1] pythrow()
@ PythonCall.Core ~/.julia/packages/PythonCall/5WGSP/src/Core/err.jl:77
[2] errcheck
@ ~/.julia/packages/PythonCall/5WGSP/src/Core/err.jl:10 [inlined]
[3] pyimport
@ ~/.julia/packages/PythonCall/5WGSP/src/Core/builtins.jl:1474 [inlined]
[4] __init__()
@ PythonPlot ~/.julia/packages/PythonPlot/oS8x4/src/init.jl:150
[5] run_module_init(mod::Module, i::Int64)
@ Base ./loading.jl:1443
[6] register_restored_modules(sv::Core.SimpleVector, pkg::Base.PkgId, path::String)
@ Base ./loading.jl:1431
[7] _include_from_serialized(pkg::Base.PkgId, path::String, ocachepath::String, depmods::Vector{Any}; register::Bool)
@ Base ./loading.jl:1319
[8] _include_from_serialized
@ ./loading.jl:1274 [inlined]
[9] _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:2115
[10] _require_search_from_serialized
@ ./loading.jl:2009 [inlined]
[11] __require_prelocked(pkg::Base.PkgId, env::String)
@ Base ./loading.jl:2627
[12] _require_prelocked(uuidkey::Base.PkgId, env::String)
@ Base ./loading.jl:2493
[13] macro expansion
@ ./loading.jl:2421 [inlined]
[14] macro expansion
@ ./lock.jl:376 [inlined]
[15] __require(into::Module, mod::Symbol)
@ Base ./loading.jl:2386
[16] require(into::Module, mod::Symbol)
@ Base ./loading.jl:2362
[17] eval(m::Module, e::Any)
@ Core ./boot.jl:489
[18] include_string(mapexpr::typeof(identity), mod::Module, code::String, filename::String)
@ Base ./loading.jl:2870
[19] _include(mapexpr::Function, mod::Module, _path::String)
@ Base ./loading.jl:2930
[20] include(mapexpr::Function, mod::Module, _path::String)
@ Base ./Base.jl:307
[21] (::Base.IncludeInto)(fname::String)
@ Base ./Base.jl:308
[22] top-level scope
@ ~/syscop/software/CCOptExperiments.jl/scripts/macmpec/run_macmpec.jl:1
in expression starting at /home/anton/syscop/software/CCOptExperiments.jl/scripts/macmpec/run_macmpec.jl:1
The second time I try to use PythonPlot I get the following:
ERROR: LoadError: InitError: could not load library "/home/anton/.julia/artifacts/48d95e60ccfecd4622b42d4fbeda49b2cbc7530b/lib/libQt6DBus.so"
/home/anton/.julia/artifacts/48d95e60ccfecd4622b42d4fbeda49b2cbc7530b/lib/libQt6DBus.so: undefined symbol: _ZN14QObjectPrivateC2E16QtPrivate_6_10_2, version Qt_6_PRIVATE_API
during initialization of module Qt6Base_jll
Which seems to be something broken in the Yggdrasil build of the Qt6Base jll package.
I haven't a clue where to even start debugging this as I am not a conda (pixi, etc) user and this seems like an issue with that side.
Activity
stevengj commentedon Jul 22, 2026
This is not about a Yggdrasil build, you are installing matplotlib via Conda. Googling the error message seems to indicate that you have inconsistent versions of harfbuzz and/or freetype in your CondaPkg. You could try
[-]Fresh Installation seems to sometiimes be very broken[/-][+]hb_ft_font_get_ft_face error from CondaPkg installation[/+]apozharski commentedon Jul 22, 2026
Yep, the reason I raised the issue here is I already tried the "google the error" routine and tried updating the
CondaPkginstalled binaries the way you describe (and even blowing away all traces ofCondaPkgand installing from scratch), however this doesn't change the symptoms at all. TheQt6Baseissue is I suspect an Yggdrasil issue (as there is no reason it should be missing the version symbol, there was some recent issues with Freecad having a broken build due to something similar), but the harfbuzz/freetype issue seems to be something odd on the CondaPkg/PythonPlot end.ranocha commentedon Aug 27, 2026
I observed similar issues. For me, they appear to be solved by JuliaPackaging/Yggdrasil#14573.