diff --git a/pkgs/os-specific/linux/module-init-tools/aggregator.nix b/pkgs/os-specific/linux/module-init-tools/aggregator.nix
index 9779efe3305f..f11642b9a68f 100644
--- a/pkgs/os-specific/linux/module-init-tools/aggregator.nix
+++ b/pkgs/os-specific/linux/module-init-tools/aggregator.nix
@@ -1,39 +1,28 @@
-args : with args;
-	let localDefs = builderDefs {
-		addSbinPath = true;
-		src = "";
-		buildInputs = [module_init_tools];
-		configureFlags = [];
-	} null; /* null is a terminator for sumArgs */
-	in with localDefs;
-let 
+{stdenv, module_init_tools, modules}:
 
-doCollect = FullDepEntry (''
-ensureDir $out/lib/modules
-cd $out/
-for i in $moduleSources; do 
-	cp -rfs $i/* .
-	chmod -R u+w .
-done
-rm -rf nix-support
-cd lib/modules/
-rm */modules.*
-#  linux-* will pass the new kernel version to depmod to take rather than `uname -r` (see man page)
-MODULE_DIR=$PWD/ depmod -a $(basename lib/modules/2.*)
-cd $out/
-'') [minInit addInputs defEnsureDir];
-in
-stdenv.mkDerivation rec {
-	name = "kernel-modules";
-	inherit moduleSources;
-	builder = writeScript (name + "-builder")
-		(textClosure localDefs [doCollect doForceShare doPropagate]);
-	meta = {
-		description = "
-		A directory to hold all  the modules, including those 
-		built separately from kernel. Later mentioned directories in 
-		moduleSources have higher priority.
-";
-		inherit src;
-	};
+stdenv.mkDerivation {
+  name = "kernel-modules";
+
+  buildCommand = ''
+    ensureDir $out/lib/modules
+    cd $out/
+    modules="${toString modules}"
+    for i in $modules; do 
+        cp -rfs $i/* .
+        chmod -R u+w .
+        v=$(cd $i/lib/modules && ls -d *)
+        if test -n "$version" -a "$v" != "$version"; then
+            echo "kernel version mismatch: $version versus $v (in the module paths $modules)";
+            exit 1
+        fi
+        version=$v
+    done
+    echo "kernel version is $version"
+    rm -rf nix-support
+    cd lib/modules/
+    rm */modules.*
+    #  linux-* will pass the new kernel version to depmod to take rather than `uname -r` (see man page)
+    MODULE_DIR=$PWD/ ${module_init_tools}/sbin/depmod -a $(basename lib/modules/2.*)
+    cd $out/
+  '';
 }
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 39f8e4484a82..0094b074bc73 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -4494,9 +4494,9 @@ let pkgs = rec {
     inherit fetchurl stdenv;
   };
 
-  module_aggregation = moduleSources:  
+  aggregateModules = modules:  
     import ../os-specific/linux/module-init-tools/aggregator.nix {
-      inherit fetchurl stdenv module_init_tools moduleSources builderDefs;
+      inherit stdenv module_init_tools modules;
     };
 
   modutils = import ../os-specific/linux/modutils {