C:\cygwin64\bin\sh -x /etc/postinstall/xlaunch.sh.done

+ case $(uname -s ) in
++ uname -s
/etc/postinstall/xlaunch.sh.done: line 2: uname: command not found
++ /usr/bin/cygpath -P
+ /usr/bin/mkdir -p '/cygdrive/c/Users/jpbouchet/AppData/Roaming/Microsoft/Windows/Start Menu/Programs/Cygwin-X'
+ /usr/bin/mkshortcut -P -i /usr/bin/xlaunch.exe -n Cygwin-X/XLaunch -a '/usr/bin/bash.exe -l -c /usr/bin/xlaunch.exe' /usr/bin/run.exe
+ /usr/share/xlaunch/setupreg.sh add
/usr/share/Xlaunch/setupreg.sh: line 8: which: command not found
/usr/share/Xlaunch/setupreg.sh: line 8: cygpath: command not found
/usr/share/Xlaunch/setupreg.sh: line 9: which: command not found
/usr/share/Xlaunch/setupreg.sh: line 9: cygpath: command not found
/usr/share/Xlaunch/setupreg.sh: line 10: which: command not found
/usr/share/Xlaunch/setupreg.sh: line 10: cygpath: command not found
/usr/share/Xlaunch/setupreg.sh: line 14: which: command not found
/usr/share/Xlaunch/setupreg.sh: line 14: cygpath: command not found
/usr/share/Xlaunch/setupreg.sh: line 38: regtool: command not found
/usr/share/Xlaunch/setupreg.sh: line 39: regtool: command not found
/usr/share/Xlaunch/setupreg.sh: line 42: regtool: command not found
/usr/share/Xlaunch/setupreg.sh: line 43: regtool: command not found
/usr/share/Xlaunch/setupreg.sh: line 45: regtool: command not found
/usr/share/Xlaunch/setupreg.sh: line 46: regtool: command not found
/usr/share/Xlaunch/setupreg.sh: line 47: regtool: command not found
/usr/share/Xlaunch/setupreg.sh: line 49: regtool: command not found
/usr/share/Xlaunch/setupreg.sh: line 50: regtool: command not found
/usr/share/Xlaunch/setupreg.sh: line 51: regtool: command not found
/usr/share/Xlaunch/setupreg.sh: line 53: regtool: command not found
/usr/share/Xlaunch/setupreg.sh: line 54: regtool: command not found