c2hsとlanguage-cをインストールできない

Question

私はcabalを使ってパッケージc2hsをインストールしています。しかし、それは幸せを必要とするので、私はhappyとcabal install happyをインストールしました。

その後、c2hsとlanguage-cをインストールしようとすると、両方でpackage happy not foundが得られます。

~> cabal install happy  
Resolving dependencies... 
[1 of 1] Compiling Main    (/tmp/happy-1.18.9-12936/happy-1.18.9/Setup.lhs, /tmp/happy-1.18.9-12936/happy-1.18.9/dist/setup/Main.o) 

/tmp/happy-1.18.9-12936/happy-1.18.9/Setup.lhs:6:52: 
    Warning: In the use of `buildVerbose' 
      (imported from Distribution.Simple.Setup): 
      Deprecated: "Use buildVerbosity instead" 

/tmp/happy-1.18.9-12936/happy-1.18.9/Setup.lhs:7:52: 
    Warning: In the use of `defaultUserHooks' 
      (imported from Distribution.Simple): 
      Deprecated: "Use simpleUserHooks or autoconfUserHooks, unless you need Cabal-1.2 
      compatibility in which case you must stick with defaultUserHooks" 

/tmp/happy-1.18.9-12936/happy-1.18.9/Setup.lhs:12:26: 
    Warning: In the use of `try' 
      (imported from System.IO.Error): 
      Deprecated: "Please use the new exceptions variant, Control.Exception.try" 
Linking /tmp/happy-1.18.9-12936/happy-1.18.9/dist/setup/setup ... 
Warning: defaultUserHooks in Setup script is deprecated. 
Configuring happy-1.18.9... 
Building happy-1.18.9... 
Preprocessing executable 'happy' for happy-1.18.9... 
[ 1 of 18] Compiling NameSet   (src/NameSet.hs, dist/build/happy/happy-tmp/NameSet.o) 
[ 2 of 18] Compiling Target   (src/Target.lhs, dist/build/happy/happy-tmp/Target.o) 
[ 3 of 18] Compiling AbsSyn   (src/AbsSyn.lhs, dist/build/happy/happy-tmp/AbsSyn.o) 
[ 4 of 18] Compiling ParamRules  (src/ParamRules.hs, dist/build/happy/happy-tmp/ParamRules.o) 
[ 5 of 18] Compiling GenUtils   (src/GenUtils.lhs, dist/build/happy/happy-tmp/GenUtils.o) 
[ 6 of 18] Compiling ParseMonad  (src/ParseMonad.lhs, dist/build/happy/happy-tmp/ParseMonad.o) 
[ 7 of 18] Compiling Lexer   (src/Lexer.lhs, dist/build/happy/happy-tmp/Lexer.o) 
[ 8 of 18] Compiling Parser   (dist/build/happy/happy-tmp/Parser.hs, dist/build/happy/happy-tmp/Parser.o) 
[ 9 of 18] Compiling AttrGrammar  (src/AttrGrammar.lhs, dist/build/happy/happy-tmp/AttrGrammar.o) 
[10 of 18] Compiling AttrGrammarParser (dist/build/happy/happy-tmp/AttrGrammarParser.hs, dist/build/happy/happy-tmp/AttrGrammarParser.o) 
[11 of 18] Compiling Grammar   (src/Grammar.lhs, dist/build/happy/happy-tmp/Grammar.o) 
[12 of 18] Compiling First   (src/First.lhs, dist/build/happy/happy-tmp/First.o) 
[13 of 18] Compiling LALR    (src/LALR.lhs, dist/build/happy/happy-tmp/LALR.o) 
[14 of 18] Compiling Paths_happy  (dist/build/autogen/Paths_happy.hs, dist/build/happy/happy-tmp/Paths_happy.o) 
[15 of 18] Compiling ProduceCode  (src/ProduceCode.lhs, dist/build/happy/happy-tmp/ProduceCode.o) 
[16 of 18] Compiling ProduceGLRCode (src/ProduceGLRCode.lhs, dist/build/happy/happy-tmp/ProduceGLRCode.o) 
[17 of 18] Compiling Info    (src/Info.lhs, dist/build/happy/happy-tmp/Info.o) 
[18 of 18] Compiling Main    (src/Main.lhs, dist/build/happy/happy-tmp/Main.o) 
Linking dist/build/happy/happy ... 
Installing executable(s) in /home/david/.cabal/bin 
~> cabal install c2hs  
Resolving dependencies... 
Configuring language-c-0.3.2.1... 
cabal: The program happy is required but it could not be found. 
cabal: Error: some packages failed to install: 
c2hs-0.16.3 depends on language-c-0.3.2.1 which failed to install. 
language-c-0.3.2.1 failed during the configure step. The exception was: 
ExitFailure 1 
exit 1 
~> cabal install language-c 
Resolving dependencies... 
Configuring language-c-0.4.2... 
cabal: The program happy is required but it could not be found. 
cabal: Error: some packages failed to install: 
language-c-0.4.2 failed during the configure step. The exception was: 
ExitFailure 1 
exit 1 
~> 

任意のアイデア：

ここでは、端末のログですか？ありがとうございました。

Answer 1

~/.cabal/binを自分のパスに追加して、それがうまくいきました。