diff --git a/pkgs/development/tools/node-webkit/nw12.nix b/pkgs/development/tools/node-webkit/nw12.nix
index f5276510e612..da85be926715 100644
--- a/pkgs/development/tools/node-webkit/nw12.nix
+++ b/pkgs/development/tools/node-webkit/nw12.nix
@@ -30,8 +30,6 @@ in stdenv.mkDerivation rec {
       "117gx6yjbcya64yg2vybcfyp591sid209pg8a33k9afbsmgz684c";
   };
 
-  phases = [ "unpackPhase" "installPhase" ];
-
   installPhase = ''
     mkdir -p $out/share/nwjs
     cp -R * $out/share/nwjs
diff --git a/pkgs/development/tools/nwjs/default.nix b/pkgs/development/tools/nwjs/default.nix
index 7d0175ac912a..2ca79410b85b 100644
--- a/pkgs/development/tools/nwjs/default.nix
+++ b/pkgs/development/tools/nwjs/default.nix
@@ -47,8 +47,6 @@ in stdenv.mkDerivation rec {
       "0nlpdz76k1p1pq4xygfr2an91m0d7p5fjyg2xhiggyy8b7sp4964";
   };
 
-  phases = [ "unpackPhase" "installPhase" ];
-
   # we have runtime deps like sqlite3 that should remain
   dontPatchELF = true;