2 files changed, 2 insertions, 2 deletions
diff --git a/pkgs/development/ocaml-modules/ounit/default.nix b/pkgs/development/ocaml-modules/ounit/default.nix
index 2f4a4f0437a2..fbb75e613309 100644
--- a/pkgs/development/ocaml-modules/ounit/default.nix
+++ b/pkgs/development/ocaml-modules/ounit/default.nix
@@ -7,7 +7,7 @@ stdenv.mkDerivation {
   buildInputs = [ findlib ];
   propagatedBuildInputs = [ ounit2 ];
 
-  phases = [ "unpackPhase" "installPhase" "fixupPhase" ];
+  dontBuild = true;
 
   createFindlibDestdir = true;
 
diff --git a/pkgs/development/ocaml-modules/z3/default.nix b/pkgs/development/ocaml-modules/z3/default.nix
index d24a95102013..01b384fe0ba5 100644
--- a/pkgs/development/ocaml-modules/z3/default.nix
+++ b/pkgs/development/ocaml-modules/z3/default.nix
@@ -10,7 +10,7 @@ stdenv.mkDerivation {
   pname = "ocaml${ocaml.version}-z3";
   inherit (z3-with-ocaml) version;
 
-  phases = [ "installPhase" "fixupPhase" ];
+  dontUnpack = true;
 
   installPhase = ''
     runHook preInstall