python error while compiling

[Shidari4ld]

"ninja: Entering directory `out/Release-x64'
[1/1189] link libexpat.a
FAILED: libexpat.a
python "/home/shi6/deps/skia/gn/rm.py" "libexpat.a" && ar rcs libexpat.a @libexpat.a.rsp
/bin/sh: 1: python: not found
[6/1189] compile ../../third_party/externals/dng_sdk/source/dng_mosaic_info.cpp
ninja: build stopped: subcommand failed.
" i tried a lot of stuff but can't fix it