Don't die if things are already installed
Don't die if things are already installed

Test Plan:
make

mcanthony/KaTeX,gagern/KaTeX,spicyj/KaTeX,mcanthony/KaTeX,franciscop/KaTeX,kwangkim/katex-npm-0.7.0-pre,mcanthony/KaTeX,azotova/KaTeX,JetStarBlues/KaTeX,frankandrobot/KaTeX,kwangkim/katex-npm-0.7.0-pre,JetStarBlues/KaTeX,JetStarBlues/KaTeX,azotova/KaTeX,Khan/KaTeX,xymostech/KaTeX,twitwi/KaTeX,frankandrobot/KaTeX,JetStarBlues/KaTeX,gagern/KaTeX,kevinbarabash/KaTeX,zhanghuiguoanlige/KaTeX,twitwi/KaTeX,kwangkim/KaTeX,gagern/KaTeX,twitwi/KaTeX,crepererum/KaTeX,kevinbarabash/KaTeX,saschatimme/KaTeX,xymostech/KaTeX,crepererum/KaTeX,crepererum/KaTeX,gagern/KaTeX,kwangkim/katex-npm-0.7.0-pre,zhanghuiguoanlige/KaTeX,mcanthony/KaTeX,kwangkim/KaTeX,franciscop/KaTeX,azotova/KaTeX,spicyj/KaTeX,kwangkim/katex-npm-0.7.0-pre,spicyj/KaTeX,saschatimme/KaTeX,spicyj/KaTeX,gagern/KaTeX,frankandrobot/KaTeX,kwangkim/KaTeX,Khan/KaTeX,xymostech/KaTeX,franciscop/KaTeX,mcanthony/KaTeX,kevinbarabash/KaTeX,JetStarBlues/KaTeX,zhanghuiguoanlige/KaTeX,crepererum/KaTeX,crepererum/KaTeX,xymostech/KaTeX,Khan/KaTeX,frankandrobot/KaTeX,kwangkim/katex-npm-0.7.0-pre,twitwi/KaTeX,azotova/KaTeX,franciscop/KaTeX,kevinbarabash/KaTeX,azotova/KaTeX,zhanghuiguoanlige/KaTeX,spicyj/KaTeX,saschatimme/KaTeX,saschatimme/KaTeX,kwangkim/KaTeX,saschatimme/KaTeX,xymostech/KaTeX,zhanghuiguoanlige/KaTeX,kevinbarabash/KaTeX,twitwi/KaTeX,franciscop/KaTeX,frankandrobot/KaTeX,kwangkim/KaTeX