diff --git a/pkgs/development/interpreters/acl2/default.nix b/pkgs/development/interpreters/acl2/default.nix
index e723133e256d..f1e2315d7941 100644
--- a/pkgs/development/interpreters/acl2/default.nix
+++ b/pkgs/development/interpreters/acl2/default.nix
@@ -1,45 +1,35 @@
-a :  
-let 
-  fetchurl = a.fetchurl;
+{ stdenv, fetchurl, sbcl }:
+
+stdenv.mkDerivation rec {
+  name = "acl2-${version}";
+  version = "v6-5";
 
-  version = a.lib.attrByPath ["version"] "v6-5" a; 
-  buildInputs = with a; [
-    sbcl
-  ];
-in
-rec {
   src = fetchurl {
     url = "http://www.cs.utexas.edu/users/moore/acl2/${version}/distrib/acl2.tar.gz";
     sha256 = "19kfclgpdyms016s06pjf3icj3mx9jlcj8vfgpbx2ac4ls0ir36g";
     name = "acl2-${version}.tar.gz";
   };
 
-  inherit buildInputs;
-  configureFlags = [];
+  buildInputs = [ sbcl ];
 
-  /* doConfigure should be removed if not needed */
-  phaseNames = ["doDeploy" "doBuild"];
-  
-  makeFlags = ["LISP='${a.sbcl}/bin/sbcl'"];
+  phases = "unpackPhase installPhase";
 
   installSuffix = "acl2";
-  doDeploy = (a.simplyShare installSuffix);
-  doBuild = a.fullDepEntry (''
+
+  installPhase = ''
+    mkdir -p $out/share/${installSuffix}
+    cp -R . $out/share/${installSuffix}
     cd $out/share/${installSuffix}
-    make LISP='${a.sbcl}/bin/sbcl --dynamic-space-size 2000'
-    make LISP='${a.sbcl}/bin/sbcl --dynamic-space-size 2000' regression
-    mkdir -p "$out/bin"
-    cp saved_acl2 "$out/bin/acl2"
-  '') ["doDeploy" "addInputs" "defEnsureDir"];
-      
-  name = "acl2-" + version;
+    make 'LISP=${sbcl}/bin/sbcl --dynamic-space-size 2000'
+    make 'LISP=${sbcl}/bin/sbcl --dynamic-space-size 2000' regression
+    make LISP=${sbcl}/bin/sbcl TAGS
+    mkdir -p $out/bin
+    cp saved_acl2 $out/bin/acl2
+  '';
+
   meta = {
     description = "An interpreter and a prover for a Lisp dialect";
-    maintainers = with a.lib.maintainers; 
-    [
-      raskin
-    ];
-    platforms = with a.lib.platforms;
-      linux;
+    maintainers = with stdenv.lib.maintainers; [ raskin ];
+    platforms = stdenv.lib.platforms.linux;
   };
 }
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 44167470a99d..a184326c0001 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -5083,7 +5083,7 @@ let
 
   ### DEVELOPMENT / INTERPRETERS
 
-  acl2 = builderDefsPackage (callPackage ../development/interpreters/acl2) {
+  acl2 = callPackage ../development/interpreters/acl2 {
     sbcl = sbcl_1_2_0;
   };