freebayes: clean up build

pkgs/applications/science/biology/freebayes/builder.sh

@@ -1,11 +0,0 @@
-source $stdenv/setup
-
-unpackPhase
-
-cd freebayes-*
-
-make
-
-mkdir -p $out/bin
-cp bin/freebayes bin/bamleftalign $out/bin
-cp scripts/* $out/bin

pkgs/applications/science/biology/freebayes/default.nix

@@ -13,9 +13,11 @@ stdenv.mkDerivation rec {
     fetchSubmodules = true;
   };
 
-  buildInputs = [ cmake gcc zlib bzip2 lzma ];
+  buildInputs = [ zlib bzip2 lzma ];
 
-  builder = ./builder.sh;
+  installPhase = ''
+    install -vD bin/freebayes bin/bamleftalign scripts/* -t $out/bin
+  '';
 
   meta = with stdenv.lib; {
     description = "Bayesian haplotype-based polymorphism discovery and genotyping";