cabal 㯠dependency hell ãæãã®ã§ããããªä½¿ãæ¹ãããã®ãä¸çªããããããªãããªã¼ã¨ããæ¹æ³ã§ãã æ¯å cabal-dev ã使ãã®ã¯é常ã«æéãæããã容éãåãã®ã§ãããã¾ã dep hell ã«å¼ã£ããã£ã¦æéãç¡é§ã«ããããã¯ããããããªãããªã¼ã¨ã cabal 㯠cabal-dev ãã¤ã³ã¹ãã¼ã«ããã ã cabal install cabal-dev cabal ã®åºçªã¯ããã ãã§ããã¨ã¯ cabal-dev ã使ãã¾ãã ã¨ãããã ~/.cabal/bin ã¸ã®ãã¹ã¯éãã¦ããã¾ãããã ãã¨ãcabal install cabal-dev ã«å¤±æãã¦ãã¾ããããªããããã¹ãã㨠rm -rf ~/.cabal rm -rf ~/.ghc ã¨ããã£ã¦ãcabal ç°å¢ã綺éºã«ãã¦ãã¾ãã¾ãããã ä½ãããã¢ããªã±ã¼ã·ã§ã³ãã¨ã« cabal-dev
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