diff --git a/pkgs/applications/science/logic/leo3/binary.nix b/pkgs/applications/science/logic/leo3/binary.nix
index dda18c49b720..6196f6443702 100644
--- a/pkgs/applications/science/logic/leo3/binary.nix
+++ b/pkgs/applications/science/logic/leo3/binary.nix
@@ -3,27 +3,26 @@ stdenv.mkDerivation rec {
   pname = "leo3";
   version = "1.2";
 
-  jar = fetchurl {
+  src = fetchurl {
     url = "https://github.com/leoprover/Leo-III/releases/download/v${version}/leo3.jar";
     sha256 = "1lgwxbr1rnk72rnvc8raq5i1q71ckhn998pwd9xk6zf27wlzijk7";
   };
 
-  phases=["installPhase" "fixupPhase"];
+  dontUnpack = true;
 
   installPhase = ''
     mkdir -p "$out"/{bin,lib/java/leo3}
-    cp "${jar}" "$out/lib/java/leo3/leo3.jar"
+    cp "${src}" "$out/lib/java/leo3/leo3.jar"
     echo "#!${runtimeShell}" > "$out/bin/leo3"
     echo "'${openjdk}/bin/java' -jar '$out/lib/java/leo3/leo3.jar' \"\$@\""  >> "$out/bin/leo3"
     chmod a+x "$out/bin/leo3"
   '';
 
-  meta = {
-    inherit version;
+  meta = with lib; {
     description = "An automated theorem prover for classical higher-order logic with choice";
-    license = lib.licenses.bsd3;
-    maintainers = [lib.maintainers.raskin];
-    platforms = lib.platforms.linux;
+    license = licenses.bsd3;
+    maintainers = [maintainers.raskin];
+    platforms = platforms.linux;
     homepage = "https://page.mi.fu-berlin.de/lex/leo3/";
   };
 }