diff --git a/pkgs/tools/graphics/ploticus/builder.sh b/pkgs/tools/graphics/ploticus/builder.sh
index c6f2d7899ba8..11ff6f5a332b 100644
--- a/pkgs/tools/graphics/ploticus/builder.sh
+++ b/pkgs/tools/graphics/ploticus/builder.sh
@@ -12,4 +12,29 @@ preInstall() {
 
 preInstall=preInstall
 
+postInstall() {
+  # Install the "prefabs".
+  ensureDir $out/share/ploticus/prefabs &&		\
+  cd .. &&						\
+  cp -rv prefabs/* $out/share/ploticus/prefabs
+
+  # Create a wrapper that knows where to find them.  Debian's package
+  # does something similar by patching directly the C file that looks
+  # for `$PLOTICUS_PREFABS'.
+  cat > $out/bin/ploticus <<EOF
+#! $SHELL -e
+PLOTICUS_PREFABS="$out/share/ploticus/prefabs"
+export PLOTICUS_PREFABS
+exec "$out/bin/pl" \$@
+EOF
+  chmod +x $out/bin/ploticus
+
+  # Install the man pages.
+  cp -rv man $out
+  ln -s "$out/man/man1/pl.1" "$out/man/man1/ploticus.1"
+}
+
+postInstall=postInstall
+
+
 genericBuild
diff --git a/pkgs/tools/graphics/ploticus/default.nix b/pkgs/tools/graphics/ploticus/default.nix
index 5edba3df0688..3efb7eab881e 100644
--- a/pkgs/tools/graphics/ploticus/default.nix
+++ b/pkgs/tools/graphics/ploticus/default.nix
@@ -24,7 +24,7 @@ stdenv.mkDerivation {
       statistical capabilities.  It allows significant user control
       over colors, styles, options and details.'';
 
-    license = "GPL";
+    license = "GPLv2+";
     homepage = http://ploticus.sourceforge.net/;
   };
 }