Here is what could be a well formed archive:

[cxl@localhost upp-posix-14205]$ make theide
make[1]: Entering directory '/home/cxl/upp-posix-14205/uppsrc'
mkdir -p /home/cxl/upp-posix-14205/cache/upp/umk/GCCMK-Gcc-Linux-Main -Posix-Shared/
mkdir -p /home/cxl/upp-posix-14205/cache/upp/ide/Builders/GCCMK-Gcc-L inux-Posix-Shared/
mkdir -p /home/cxl/upp-posix-14205/cache/upp/ide/Core/GCCMK-Gcc-Linux -Posix-Shared/
mkdir -p /home/cxl/upp-posix-14205/cache/upp/ide/Android/GCCMK-Gcc-Li nux-Posix-Shared/
mkdir -p /home/cxl/upp-posix-14205/cache/upp/ide/Java/GCCMK-Gcc-Linux -Posix-Shared/
mkdir -p /home/cxl/upp-posix-14205/cache/upp/Esc/GCCMK-Gcc-Linux-Posi x-Shared/
mkdir -p /home/cxl/upp-posix-14205/cache/upp/plugin/bz2/GCCMK-Gcc-Lin ux-Posix-Shared/
mkdir -p /home/cxl/upp-posix-14205/cache/upp/plugin/lzma/GCCMK-Gcc-Li nux-Posix-Shared/
mkdir -p /home/cxl/upp-posix-14205/cache/upp/plugin/lz4/GCCMK-Gcc-Lin ux-Posix-Shared/
mkdir -p /home/cxl/upp-posix-14205/cache/upp/plugin/zstd/GCCMK-Gcc-Li nux-Posix-Shared/
mkdir -p /home/cxl/upp-posix-14205/cache/upp/Core/GCCMK-Gcc-Linux-Pos ix-Shared/
mkdir -p /home/cxl/upp-posix-14205/cache/upp/plugin/pcre/GCCMK-Gcc-Li nux-Posix-Shared/
(date '+#define bmYEAR %y%n#define bmMONTH %-m%n#define bmDAY %-d%n#define bmHOUR %-H%n#define bmMINUTE %-M%n#define bmSECOND %-S%n#define bmTIME Time(%y, %-m, %-d, %-H, %-M, %-S)' && \
echo '#define bmMACHINE "'`hostname`'"' && \
echo '#define bmUSER "'`whoami`'"') > build_info.h
c++ -c -x c++ -O3 -ffunction-sections -fdata-sections -std=c++14 -I./ -DflagGCC -DflagSHARED -DflagPOSIX -DflagLINUX -DflagMAIN umk/MacOs.cpp -o /home/cxl/upp-posix-14205/cache/upp/umk/GCCMK-Gcc-Linux-Main -Posix-Shared/MacOs.o
make[1]: c++: Command not found
make[1]: *** [uMakefile.in:216: /home/cxl/upp-posix-14205/cache/upp/umk/GCCMK-Gcc-Linux-Main -Posix-Shared/MacOs.o] Error 127
make[1]: *** Waiting for unfinished jobs....
echo '#define bmSVN_REVISION "14205"' >> build_info.h
echo '#define bmSVN_URL "svn://www.ultimatepp.org/upp/trunk/uppsrc/umk"' >> build_info.h
make[1]: Leaving directory '/home/cxl/upp-posix-14205/uppsrc'
make: *** [Makefile:51: umk] Error 2