var os/exec.ErrNotFound

5 uses

	os/exec (current package)
		lp_unix.go#L20: var ErrNotFound = errors.New("executable file not found in $PATH")
		lp_unix.go#L81: 	return "", &Error{file, ErrNotFound}

	golang.org/x/tools/go/packages
		golist.go#L862: 		if ee, ok := err.(*exec.Error); ok && ee.Err == exec.ErrNotFound {
		golist.go#L863: 			return nil, fmt.Errorf("'go list' driver requires 'go', but %s", exec.ErrNotFound)

	golang.org/x/tools/internal/gocommand
		invoke.go#L192: 		if ee, ok := rawError.(*exec.Error); ok && ee.Err == exec.ErrNotFound {