diff --git a/pkgs/applications/science/logic/tlaplus/tlaps.nix b/pkgs/applications/science/logic/tlaplus/tlaps.nix
index 89bdd979fea0..90a4aeb4f8ab 100644
--- a/pkgs/applications/science/logic/tlaplus/tlaps.nix
+++ b/pkgs/applications/science/logic/tlaplus/tlaps.nix
@@ -1,6 +1,12 @@
 { fetchurl
-, lib, stdenv
-, ocaml, isabelle, cvc3, perl, wget, which
+, lib
+, stdenv
+, ocaml
+, isabelle
+, cvc3
+, perl
+, wget
+, which
 }:
 
 stdenv.mkDerivation rec {
@@ -13,8 +19,6 @@ stdenv.mkDerivation rec {
 
   buildInputs = [ ocaml isabelle cvc3 perl wget which ];
 
-  phases = [ "unpackPhase" "installPhase" ];
-
   installPhase = ''
     mkdir -pv "$out"
     export HOME="$out"
@@ -45,9 +49,9 @@ stdenv.mkDerivation rec {
       and scalable to large system specifications. It provides a
       consistent abstraction over the various “backend” verifiers.
     '';
-    homepage    = "https://tla.msr-inria.inria.fr/tlaps/content/Home.html";
-    license     = lib.licenses.bsd2;
-    platforms   = lib.platforms.unix;
+    homepage = "https://tla.msr-inria.inria.fr/tlaps/content/Home.html";
+    license = lib.licenses.bsd2;
+    platforms = lib.platforms.unix;
     maintainers = [ ];
   };