gpsbabel: remove use of phases

Also make use of `makeWrapper`.

pkgs/applications/misc/gpsprune/default.nix

@@ -1,4 +1,4 @@
-{ fetchurl, stdenv, makeDesktopItem, unzip, bash, jre8 }:
+{ fetchurl, stdenv, makeDesktopItem, makeWrapper, unzip, bash, jre8 }:
 
 stdenv.mkDerivation rec {
   name = "gpsprune-${version}";
@@ -9,8 +9,7 @@ stdenv.mkDerivation rec {
     sha256 = "0n08fg55zgpfg1f6lq0n3ngi0n8af1r0rhmbnpik5mjng4m9g3x5";
   };
 
-  phases = [ "installPhase" ];
-
+  nativeBuildInputs = [ makeWrapper ];
   buildInputs = [ jre8 ];
 
   desktopItem = makeDesktopItem {
@@ -23,15 +22,11 @@ stdenv.mkDerivation rec {
     categories = "Education;Geoscience;";
   };
 
-  installPhase = ''
+  buildCommand = ''
     mkdir -p $out/bin $out/share/java
     cp -v $src $out/share/java/gpsprune.jar
-    cat > $out/bin/gpsprune <<EOF
-    #!${bash}/bin/bash
-    exec ${jre8}/bin/java -jar $out/share/java/gpsprune.jar "\$@"
-    EOF
-    chmod 755 $out/bin/gpsprune
-
+    makeWrapper ${jre8}/bin/java $out/bin/gpsprune \
+      --add-flags "-jar $out/share/java/gpsprune.jar"
     mkdir -p $out/share/applications
     cp $desktopItem/share/applications"/"* $out/share/applications
     mkdir -p $out/share/pixmaps