Need help package SciDAVis: sip: Unable to find file "QtCore/QtCoremod.sip"

[andythe_great]

Hello,

I have been trying to package SciDAVis.
https://github.com/highperformancecoder/scidavis

Here is my progress.
https://github.com/kevinsmia1939/io.github.highperformancecoder.SciDAVis

I build with this command.
flatpak-builder --install --user build net.sourceforge.scidavis.SciDAVis.yaml --force-clean

I could not compile SciDAVis. Error below.
It found PyQt.
-- The CXX compiler identification is GNU 10.2.0
-- The C compiler identification is GNU 10.2.0
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Check for working CXX compiler: /usr/bin/c++ - skipped
-- Detecting CXX compile features
-- Detecting CXX compile features - done
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Check for working C compiler: /usr/bin/cc - skipped
-- Detecting C compile features
-- Detecting C compile features - done
-- Found Python3: /usr/bin/python3.8 (found version "3.8.7") found components: Interpreter Development Development.Module Development.Embed
-- Found SIP: /app/bin/sip (found version "4.19.13")
-- Found PyQt: /app/include/PyQt5 (found version "5.11.3")
-- Found PkgConfig: /usr/bin/pkg-config (found version "1.7.3")
-- Found GSL: /app/include (found version "2.6")
-- Found ZLIB: /usr/lib/x86_64-linux-gnu/libz.so (found suitable version "1.2.11", minimum required is "1.2.11")
-- Found OpenGL: /usr/lib/x86_64-linux-gnu/libOpenGL.so found components: OpenGL
-- Found muParser : /app/lib/libmuparser.so include: /app/include
-- Qt5 GUI found /usr/include/;/usr/include/QtGui
-- Qwt5: using own code
-- QwtPlot3D: using own code
-- liborigin not enabled
-- Configuring done
-- Generating done

But later this happen.
sip: Unable to find file "QtCore/QtCoremod.sip"

How to fix this?
Thanks.
Andy
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