diff --git a/pkgs/development/tools/build-managers/bam/default.nix b/pkgs/development/tools/build-managers/bam/default.nix
index b01d22b524b..c20431c5e7e 100644
--- a/pkgs/development/tools/build-managers/bam/default.nix
+++ b/pkgs/development/tools/build-managers/bam/default.nix
@@ -1,62 +1,35 @@
-x@{builderDefsPackage
-  , lua5, python
-  , ...}:
-builderDefsPackage
-(a :
-let
-  helperArgNames = ["stdenv" "fetchurl" "builderDefsPackage"] ++
-    [];
+{ stdenv, fetchurl, lua5, python }:
 
-  buildInputs = map (n: builtins.getAttr n x)
-    (builtins.attrNames (builtins.removeAttrs x helperArgNames));
-  sourceInfo = rec {
-    baseName="bam";
-    version="0.4.0";
-    name="${baseName}-${version}";
-    url="http://github.com/downloads/matricks/bam/${name}.tar.bz2";
-    hash="0z90wvyd4nfl7mybdrv9dsd4caaikc6fxw801b72gqi1m9q0c0sn";
-  };
-in
-rec {
-  src = a.fetchurl {
-    url = sourceInfo.url;
-    sha256 = sourceInfo.hash;
+stdenv.mkDerivation rec {
+  name = "bam-${version}";
+  version = "0.4.0";
+
+  src = fetchurl {
+    url = "http://github.com/downloads/matricks/bam/${name}.tar.bz2";
+    sha256 = "0z90wvyd4nfl7mybdrv9dsd4caaikc6fxw801b72gqi1m9q0c0sn";
   };
 
-  inherit (sourceInfo) name version;
-  inherit buildInputs;
+  buildInputs = [ lua5 python ];
 
-  /* doConfigure should be removed if not needed */
-  phaseNames = ["check" "doDeploy"];
+  buildPhase = ''${stdenv.shell} make_unix.sh'';
 
-  build = a.fullDepEntry ''
-    sh make_unix.sh
-  '' ["minInit" "doUnpack" "addInputs"];
+  checkPhase = ''${python.interpreter} scripts/test.py'';
 
-  check = a.fullDepEntry ''
-    python scripts/test.py
-  '' ["build" "addInputs"];
-
-  doDeploy = a.fullDepEntry ''
+  installPhase = ''
     mkdir -p "$out/share/bam"
     cp -r docs examples tests  "$out/share/bam"
     mkdir -p "$out/bin"
     cp bam "$out/bin"
-  '' ["minInit" "defEnsureDir" "build"];
+  '';
 
-  meta = {
+  meta = with stdenv.lib; {
     description = "Yet another build manager";
-    maintainers = with a.lib.maintainers;
+    maintainers = with maintainers;
     [
       raskin
     ];
-    platforms = with a.lib.platforms;
-      linux;
-    license = a.lib.licenses.free;
+    platforms = platforms.linux;
+    license = licenses.free;
+    downloadPage = "http://matricks.github.com/bam/";
   };
-  passthru = {
-    updateInfo = {
-      downloadPage = "http://matricks.github.com/bam/";
-    };
-  };
-}) x
+}