visit: build visit fails to build qt5 on rztopaz toss4

build visit invocation:

./build_visit --makeflags -j24 --mesagl --mpich --required --optional --no-gdal

I’m using gcc 10.3.1

This is from the console:

Building Qt (~60 minutes)
Unzipping/Untarring qt-everywhere-src-5.14.2.tar.xz . . .
Patching qt . . .
Patching qt 5.14.2 for numeric-limits
Patching qt 5.14.2 for qjp2handler cmath include
Patching qt 5.14.2 for Linux and Mesa-as-GL
Configuring Qt5: 
Building Qt5 . . . (~60 minutes)
Qt5 build failed. Giving up
Unable to build or install Qt. Bailing out.
Error in build process. See build_visit_log for more information. If the error is unclear, please include build_visit_log and contact the VisIt project via https://visit-help.llnl.gov. You may need to compress the build_visit_log using a program like gzip so it will fit within the size limits for attachments.
Log file full path:  /usr/workspace/justin/visit_builds/develop-w-tpls/build_visit_log

From the log:

sh: python: command not found
Project ERROR: Building QtQml requires Python.
make: *** [Makefile:215: module-qtdeclarative-make_first] Error 3

What happens when I try python

bash-4.4$ python
bash: python: command not found

How should I proceed?