chicken: fixes for chicken 5.1.0

- fix incorrect binaryVersion
- upgrade chicken-5 eggs
- fix repository path

pkgs/development/compilers/chicken/5/chicken.nix

@@ -13,7 +13,7 @@ in
 stdenv.mkDerivation {
   name = "chicken-${version}";
 
-  binaryVersion = 9;
+  binaryVersion = 11;
 
   src = fetchurl {
     url = "https://code.call-cc.org/releases/${version}/chicken-${version}.tar.gz";
@@ -22,8 +22,8 @@ stdenv.mkDerivation {
 
   setupHook = lib.ifEnable (bootstrap-chicken != null) ./setup-hook.sh;
 
-  buildFlags = "PLATFORM=${platform} PREFIX=$(out) VARDIR=$(out)/var/lib";
-  installFlags = "PLATFORM=${platform} PREFIX=$(out) VARDIR=$(out)/var/lib";
+  buildFlags = "PLATFORM=${platform} PREFIX=$(out)";
+  installFlags = "PLATFORM=${platform} PREFIX=$(out)";
 
   buildInputs = [
     makeWrapper
@@ -37,10 +37,6 @@ stdenv.mkDerivation {
       wrapProgram $f \
         --prefix PATH : ${stdenv.cc}/bin
     done
-
-    mv $out/var/lib/chicken $out/lib
-    rmdir $out/var/lib
-    rmdir $out/var
   '';
 
   # TODO: Assert csi -R files -p '(pathname-file (repository-path))' == binaryVersion