diff --git a/pkgs/development/compilers/ghc-6.6/builder.sh b/pkgs/development/compilers/ghc-6.6/builder.sh
deleted file mode 100644
index 4f4760d69177..000000000000
--- a/pkgs/development/compilers/ghc-6.6/builder.sh
+++ /dev/null
@@ -1,26 +0,0 @@
-source $stdenv/setup
-
-# Setup isolated package management
-postInstall()
-{
-    ensureDir "$out/nix-support"
-    echo "# Path to the GHC compiler directory in the store" > $out/nix-support/setup-hook
-    echo "ghc=$out" >> $out/nix-support/setup-hook
-    echo ""         >> $out/nix-support/setup-hook
-    cat $setupHook  >> $out/nix-support/setup-hook
-}
-postInstall=postInstall
-
-configureFlags="--with-readline-libraries=\"$readline/lib\""
-
-preConfigure()
-{
-    chmod u+x rts/gmp/configure
-    # add library paths for gmp, ncurses
-    sed -i "s|^\(library-dirs.*$\)|\1 \"$gmp/lib\"|" rts/package.conf.in
-    sed -i "s|^\(library-dirs.*$\)|\1 \"$ncurses/lib\"|" libraries/readline/package.conf.in
-}
-preConfigure=preConfigure
-
-# Standard configure/make/make install
-genericBuild
diff --git a/pkgs/development/compilers/ghc-6.6/default.nix b/pkgs/development/compilers/ghc-6.6/default.nix
deleted file mode 100644
index f76547c89d7d..000000000000
--- a/pkgs/development/compilers/ghc-6.6/default.nix
+++ /dev/null
@@ -1,26 +0,0 @@
-{stdenv, fetchurl, readline, ghc, perl, m4, gmp, ncurses}:
-
-stdenv.mkDerivation {
-  name = "ghc-6.6";
-
-  src = map fetchurl [
-    { url = http://www.haskell.org/ghc/dist/6.6/ghc-6.6-src.tar.bz2;
-      md5 = "2427a8d7d14f86e0878df6b54938acf7";
-    }
-    { url = http://www.haskell.org/ghc/dist/6.6/ghc-6.6-src-extralibs.tar.bz2;
-      md5 = "14b22fce36caffa509046361724bc119";
-    }
-  ];
-
-  builder = ./builder.sh;
-
-  buildInputs = [ghc readline perl m4];
-
-  setupHook = ./setup-hook.sh;
-
-  meta = {
-    description = "The Glasgow Haskell Compiler v6.6";
-  };
-
-  inherit readline gmp ncurses;
-}
diff --git a/pkgs/development/compilers/ghc-6.6/setup-hook.sh b/pkgs/development/compilers/ghc-6.6/setup-hook.sh
deleted file mode 100644
index b8441abc98a7..000000000000
--- a/pkgs/development/compilers/ghc-6.6/setup-hook.sh
+++ /dev/null
@@ -1,41 +0,0 @@
-# Support dir for isolating GHC
-ghc_support=$TMPDIR/ghc-6.6-nix-support
-mkdir -p $ghc_support
-
-# Create isolated package config
-packages_db=$ghc_support/package.conf
-cp $ghc/lib/ghc-*/package.conf $packages_db
-chmod +w $packages_db
-
-# Generate wrappers for GHC that use the isolated package config
-makeWrapper() {
-  wrapperName="$1"
-  wrapper="$ghc_support/$wrapperName"
-  shift #the other arguments are passed to the source app
-  echo '#!'"$SHELL" > "$wrapper"
-  echo "exec \"$ghc/bin/$wrapperName\" $@" '"$@"' >> "$wrapper"
-  chmod +x "$wrapper"
-}
-
-makeWrapper "ghc"         "-no-user-package-conf -package-conf $packages_db"
-makeWrapper "ghci"        "-no-user-package-conf -package-conf $packages_db"
-makeWrapper "runghc"      "-no-user-package-conf -package-conf $packages_db"
-makeWrapper "runhaskell"  "-no-user-package-conf -package-conf $packages_db"
-makeWrapper "ghc-pkg"     "--global-conf $packages_db"
-
-# Add wrappers to search path
-export _PATH=$ghc_support:$_PATH
-
-# Env hook to add packages to the package config
-addLibToPackageConf ()
-{
-    local regscript=$1/nix-support/register-ghclib.sh
-    if test -f $regscript; then
-        local oldpath=$PATH
-        export PATH=$ghc_support:$PATH
-        sh $regscript $package_db
-        export PATH=$oldpath
-    fi
-}
-
-envHooks=(${envHooks[@]} addLibToPackageConf)
diff --git a/pkgs/development/compilers/ghc-6.8/head.nix b/pkgs/development/compilers/ghc-6.8/head.nix
deleted file mode 100644
index e274070036a7..000000000000
--- a/pkgs/development/compilers/ghc-6.8/head.nix
+++ /dev/null
@@ -1,47 +0,0 @@
-{stdenv, fetchurl, readline, ghc, happy, alex, perl, m4, gmp, ncurses, haskellEditline}:
-
-stdenv.mkDerivation (rec {
-  name = "ghc-6.9.20080719";
-  homepage = "http://www.haskell.org/ghc";
-
-  src = map fetchurl [
-    { url    = "${homepage}/dist/current/dist/${name}-src.tar.bz2";
-      sha256 = "ed2371c3632962fccab6ec60c04e9fc6a38f3ade3a30a464cea5d53784bc3a34";
-    }
-    { url    = "${homepage}/dist/current/dist/${name}-src-extralibs.tar.bz2";
-      sha256 = "d3c7aa7d53befe268f92148cc8f3b0861dfdc84e9b21b039af0f5b230bfbf72b";
-    }
-  ];
-
-  buildInputs = [ghc readline perl m4 gmp happy alex haskellEditline];
-
-  # The setup hook is executed by other packages building with ghc.
-  # It then looks for package configurations that are available and
-  # build a package database on the fly.
-  setupHook = ./setup-hook.sh;
-
-  meta = {
-    description = "The Glasgow Haskell Compiler";
-  };
-
-  configureFlags=[
-    "--with-gmp-libraries=${gmp}/lib"
-    "--with-gmp-includes=${gmp}/include"
-    "--with-readline-libraries=${readline}/lib"
-    "--with-gcc=${gcc}/bin/gcc"
-  ];
-
-  preConfigure = ''
-    # should not be present in a clean distribution
-    rm utils/pwd/pwd
-    # fix bug in makefile
-    sed -i -e 's/:\\"//' -e 's/\\"//' mk/config.mk.in
-  '';
-
-  postInstall = ''
-    ln -s $out/lib/${name}/ghc $out/lib/${name}/${name}
-  '';
-
-  inherit (stdenv) gcc;
-  inherit readline gmp ncurses;
-})
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index daca449f7273..c1897e99d421 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -1831,11 +1831,6 @@ let
       inherit ghc;
   };
 
-  # ghc66boot = import ../development/compilers/ghc-6.6-boot {
-  #  inherit fetchurl stdenv perl readline;
-  #  m4 = gnum4;
-  #};
-
   ghc = ghc683;
 
   ghc682 = import ../development/compilers/ghc-6.8/ghc-6.8.2.nix {
@@ -1849,21 +1844,11 @@ let
     haddock = haddockboot;
   };
 
-  ghc69snapshot = lowPrio (import ../development/compilers/ghc-6.8/head.nix {
-    inherit fetchurl stdenv readline perl gmp ncurses m4 happy alex haskellEditline;
-    ghc = ghc683;
-  });
-
   ghc661 = import ../development/compilers/ghc-6.6.1 {
     inherit fetchurl stdenv readline perl58 gmp ncurses m4;
     ghc = ghcboot;
   };
 
-  ghc66 = import ../development/compilers/ghc-6.6 {
-    inherit fetchurl stdenv readline perl gmp ncurses m4;
-    ghc = ghcboot;
-  };
-
   ghc64 = import ../development/compilers/ghc {
     inherit fetchurl stdenv perl ncurses readline m4 gmp;
     gcc = stdenv.gcc;
@@ -1881,13 +1866,6 @@ let
     # readline = if stdenv.system == "i686-linux" then readline4 else readline;
     perl = perl58;
   }));
-  /*
-  ghcWrapper = assert uulib.ghc == ghc;
-    import ../development/compilers/ghc-wrapper {
-      inherit stdenv ghc;
-      libraries = [];
-    };
-  */
 
   gprolog = import ../development/compilers/gprolog {
     inherit fetchurl stdenv;
@@ -4212,7 +4190,7 @@ let
     inherit stdenv fetchurl;
     ghc = ghc682;
   };
-
+  
   cabal683 = import ../development/libraries/haskell/cabal/cabal.nix {
     inherit stdenv fetchurl;
     ghc = ghc683;