The subjunctive is a mood of will, and therefore takes μή.2707
Independent clauses take μή: the hortatory subjunctive ( cross1797), the prohibitive subjunctive ( cross1800), the deliberative subjunctive ( cross1805), the subjunctive of doubtful assertion ( cross1801).2708
Dependent clauses take μή: final clauses, as
δοκεῖ μοι κατακαῦσαι τὰ_ς ἁμάξα_ς . . . ἵνα μὴ τὰ ζεύγη ἡμῶν στρατηγῇ
a. After μή
The imperative is a mood of will and therefore takes μή in prohibitions ( cross1840).
a. The future indicative after interrogative οὐ has an imperative sense ( cross1918).
Herbert Weir Smyth [n.d.], A Greek Grammar for Colleges; Machine readable text [info] [word count] [Smyth].