Hair-thin lines in Sketch.app

TRying to make a vector, Yosemite-friendly menubar icon.

While using 1-pixel lines does make the icon's horizontal lines look sharp on normal displays, peaks are cut off.

Adding just 0.1 pixels to border thickness greatly improves the peaks without significant quality loss on horizontal lines.

P.S.: I do know that creating separate raster icons for both resolutions would allow me to fix the tiny rendering issues on 1x.