diff --git a/pkgs/development/compilers/jdk/dlj-bundle-builder.sh b/pkgs/development/compilers/jdk/dlj-bundle-builder.sh
index 0b43c0f4419a..4b9d0d482625 100644
--- a/pkgs/development/compilers/jdk/dlj-bundle-builder.sh
+++ b/pkgs/development/compilers/jdk/dlj-bundle-builder.sh
@@ -32,9 +32,9 @@ for i in $libraries; do
 done
 
 if test -z "$installjdk"; then
-  rpath=$rpath${rpath:+:}$out/lib/i386/jli
+  rpath=$rpath${rpath:+:}$out/lib/$architecture/jli
 else
-  rpath=$rpath${rpath:+:}$out/jre/lib/i386/jli
+  rpath=$rpath${rpath:+:}$out/jre/lib/$architecture/jli
 fi
 
 # set all the dynamic linkers
diff --git a/pkgs/development/compilers/jdk/jdk6-linux.nix b/pkgs/development/compilers/jdk/jdk6-linux.nix
index 9020705396d6..96647e2ac98c 100644
--- a/pkgs/development/compilers/jdk/jdk6-linux.nix
+++ b/pkgs/development/compilers/jdk/jdk6-linux.nix
@@ -37,6 +37,17 @@ assert swingSupport -> xlibs != null;
   construct = ./jdk6-construct.sh;
   inherit installjdk;
 
+  /**
+   * The JRE libraries are in directories that depend on the CPU.
+   */
+  architecture =
+    if stdenv.system == "i686-linux" then
+      "i386"
+    else if stdenv.system == "x86_64-linux" then
+      "amd64"
+    else
+      abort "jdk requires i686-linux or x86_64 linux";
+
   buildInputs = [unzip];
   libraries =
     (if swingSupport then [xlibs.libX11 xlibs.libXext xlibs.libXtst xlibs.libXi] else []);
@@ -52,7 +63,7 @@ assert swingSupport -> xlibs != null;
   ( if stdenv.system == "i686-linux" then
       {
         mozillaPlugin =
-         if installjdk then "jre/plugin/i386/ns7" else "/plugin/i386/ns7";
+         if installjdk then "jre/plugin/i386/ns7" else "plugin/i386/ns7";
       }
     else
       {}