The verb ending -네 requires to remove any ㄹ 받침. Therefore, 머네 is the right form.

it is 머네. When an ending syllable with 받침 "ㄹ" combines with 네, 니, etc, the "ㄹ" is dropped. ex) 살다: 사네, 사니, 사느니만, 사노라면 울다: 우네, 우니,.. 깨물다: 깨무네, 깨무니, ...