diff --git a/pkgs/misc/emulators/gxemul/default.nix b/pkgs/misc/emulators/gxemul/default.nix
index ba1b63855e34..ea2d6bbfecc8 100644
--- a/pkgs/misc/emulators/gxemul/default.nix
+++ b/pkgs/misc/emulators/gxemul/default.nix
@@ -1,12 +1,8 @@
-{ stdenv, composableDerivation, fetchurl }:
+{ stdenv, fetchurl }:
 
-let edf = composableDerivation.edf;
-    version = "0.6.0.1";
-    name = "gxemul-${version}";
-in
-
-composableDerivation.composableDerivation {} {
-  inherit name;
+stdenv.mkDerivation rec {
+  name = "gxemul-${version}";
+  version = "0.6.0.1";
 
   src = fetchurl {
     url = "http://gxemul.sourceforge.net/src/${name}.tar.gz";
@@ -15,21 +11,14 @@ composableDerivation.composableDerivation {} {
 
   configurePhase = "./configure";
 
-  installPhase = "mkdir -p \$out/bin; cp gxemul \$out/bin;";
-
-  mergeAttrBy = { installPhase = a : b : "${a}\n${b}"; };
-
-  flags = {
-    doc   = { installPhase = "mkdir -p \$out/share/${name}; cp -r doc \$out/share/${name};"; implies = "man"; };
-    demos = { installPhase = "mkdir -p \$out/share/${name}; cp -r demos \$out/share/${name};"; };
-    man   = { installPhase = "cp -r ./man \$out/;";};
-  };
-
-  cfg = {
-    docSupport = true;
-    demosSupport = true;
-    manSupport = true;
-  };
+  installPhase = ''
+    mkdir -p $out/bin;
+    mkdir -p $out/share/${name};
+    cp gxemul $out/bin;
+    cp -r doc $out/share/${name};
+    cp -r demos $out/share/${name};
+    cp -r ./man $out/;
+  '';
 
   meta = {
     license = stdenv.lib.licenses.bsd3;
@@ -45,5 +34,4 @@ composableDerivation.composableDerivation {} {
     '';
     homepage = http://gxemul.sourceforge.net/;
   };
-
 }