ERROR:root:make[1]: Entering directory '/tmp/kci/linux-local-master-v6.2-rc4-77-gd368967cb103/.kunit' GEN Makefile LEX scripts/kconfig/lexer.lex.c /bin/sh: 1: flex: not found make[2]: *** [../scripts/Makefile.host:9: scripts/kconfig/lexer.lex.c] Error 127 make[1]: *** [/tmp/kci/linux-local-master-v6.2-rc4-77-gd368967cb103/Makefile:708: olddefconfig] Error 2 make[1]: Leaving directory '/tmp/kci/linux-local-master-v6.2-rc4-77-gd368967cb103/.kunit' make: *** [Makefile:242: __sub-make] Error 2 [12:42:14] Configuring KUnit Kernel ... Regenerating .config ... Populating config with: $ make ARCH=um O=.kunit olddefconfig [12:42:14] Elapsed time: 0.067s ERROR:root:make[1]: Entering directory '/tmp/kci/linux-local-master-v6.2-rc4-77-gd368967cb103/.kunit' GEN Makefile LEX scripts/kconfig/lexer.lex.c /bin/sh: 1: flex: not found make[2]: *** [../scripts/Makefile.host:9: scripts/kconfig/lexer.lex.c] Error 127 make[1]: *** [/tmp/kci/linux-local-master-v6.2-rc4-77-gd368967cb103/Makefile:708: olddefconfig] Error 2 make[1]: Leaving directory '/tmp/kci/linux-local-master-v6.2-rc4-77-gd368967cb103/.kunit' make: *** [Makefile:242: __sub-make] Error 2 [12:47:09] Configuring KUnit Kernel ... Regenerating .config ... Populating config with: $ make ARCH=um O=.kunit olddefconfig [12:47:09] Elapsed time: 0.103s