diff -r c040f992052f -r 1c52a0eeb952 vendor/github.com/mattn/go-isatty/isatty_bsd.go
--- a/vendor/github.com/mattn/go-isatty/isatty_bsd.go	Wed Sep 18 19:17:42 2019 +0200
+++ b/vendor/github.com/mattn/go-isatty/isatty_bsd.go	Sun Feb 16 18:54:01 2020 +0100
@@ -3,16 +3,16 @@
 
 package isatty
 
-import (
-	"syscall"
-	"unsafe"
-)
-
-const ioctlReadTermios = syscall.TIOCGETA
+import "golang.org/x/sys/unix"
 
 // IsTerminal return true if the file descriptor is terminal.
 func IsTerminal(fd uintptr) bool {
-	var termios syscall.Termios
-	_, _, err := syscall.Syscall6(syscall.SYS_IOCTL, fd, ioctlReadTermios, uintptr(unsafe.Pointer(&termios)), 0, 0, 0)
-	return err == 0
+	_, err := unix.IoctlGetTermios(int(fd), unix.TIOCGETA)
+	return err == nil
 }
+
+// IsCygwinTerminal return true if the file descriptor is a cygwin or msys2
+// terminal. This is also always false on this environment.
+func IsCygwinTerminal(fd uintptr) bool {
+	return false
+}