diff --git a/NOISE b/NOISE
index cab9f35..2d5cd6c 100644
--- a/NOISE
+++ b/NOISE
@@ -108,3 +108,19 @@ ABSTRACT
   Do not use to ensure reproducibility.
 
 /* vim: set ts=2 sw=2 tw=72 fo=watqc expandtab spell autoindent: */
+
+1.8 Make doesn't rebuild objects
+
+  When using local repo as src code, (e.g. developer mode on) a make
+  clean at the preBuild stage is required.
+
+  Nix sets the same modification date (one second after the Epoch (1970-01-01 at 00:00:01 in UTC timezone) to all the files in the nix store (also those copied from repos).
+  Makefile checks the files modification date in order to call or not
+  the compilation instructions.
+  If any object/binary file exists out of Nix, at the time we build 
+  within Nix, they will be copied with the current data and consequently 
+  not updated during the Nix compilation process.
+
+  See saiph devMode option and its implications at   
+  bscpkgs/garlic/saiph/default.nix
+  
diff --git a/garlic/exp/saiph/numcomm.nix b/garlic/exp/saiph/numcomm.nix
index 07e108c..7da9d9c 100644
--- a/garlic/exp/saiph/numcomm.nix
+++ b/garlic/exp/saiph/numcomm.nix
@@ -12,6 +12,7 @@ with stdenv.lib;
 let
   # Set variable configuration for the experiment
   varConfig = {
+    devMode = [ true ];
     numComm = [ 1 ];
   };
 
@@ -23,11 +24,11 @@ let
 
     # Resources
     ntasksPerNode = "2";
-    nodes = "2";
+    nodes = "1";
 
     # Stage configuration
     enableSbatch = true;
-    enableControl = false;
+    enableControl = true;
     enableExtrae = false;
     enablePerf = false;
 
@@ -63,7 +64,8 @@ let
   );
 
   control = {stage, conf, ...}: with conf; w.control {
-    program = stageProgram stage;
+     program = stageProgram stage;
+     loops = 100;
   };
 
   srun = {stage, conf, ...}: with conf; w.srun {
@@ -127,6 +129,7 @@ let
   argv = {stage, conf, ...}: with conf; w.argv {
     program = stageProgram stage;
     env = ''
+      export OMP_NUM_THREADS=24
       export NANOS6_REPORT_PREFIX="#"
       export I_MPI_THREAD_SPLIT=1
       export ASAN_SYMBOLIZER_PATH=${pkgs.bsc.clangOmpss2Unwrapped}/bin/llvm-symbolizer
@@ -146,7 +149,7 @@ let
       });
     in
     customPkgs.bsc.garlic.saiph.override {
-      inherit numComm mpi gitBranch;
+      inherit devMode numComm mpi gitBranch;
     };
 
   stages = with common; []
diff --git a/garlic/saiph/default.nix b/garlic/saiph/default.nix
index 3028042..c9f3cad 100644
--- a/garlic/saiph/default.nix
+++ b/garlic/saiph/default.nix
@@ -6,20 +6,23 @@
 , cc 
 , vtk
 , boost
+, devMode ? false
 , gitBranch ? "master"
 , numComm ? null
+, vectFlags ? null
+#, breakpointHook
 }:
 
 stdenv.mkDerivation rec {
   name = "saiph";
 
-  src = builtins.fetchGit {
-    url = "ssh://git@bscpm02.bsc.es/DSLs/saiph.git";
-    ref = "${gitBranch}";
-  };
+  src = (if (devMode == true) then ~/repos/saiph
+         else
+	 builtins.fetchGit {
+           url = "ssh://git@bscpm02.bsc.es/DSLs/saiph.git";
+           ref = "${gitBranch}";
+         });
 
-  #src = /tmp/saiph;
-  
   programPath = "/bin/ExHeat3D";
 
   enableParallelBuilding = true;
@@ -33,23 +36,26 @@ stdenv.mkDerivation rec {
     cc
     vtk
     boost
+#    breakpointHook
   ];
 
   # Required for nanos6
   hardeningDisable = [ "bindnow" ];
   
   preBuild = ''
-    cd saiphv2/cpp/src
-
+    cd saiphv2/cpp/src 
     export VTK_VERSION=8.2
     export VTK_HOME=${vtk}
-  '';
+  ''
+  + (if (devMode == true) then "make clean" else "")
+  ;
 
   makeFlags = [
     "-f" "Makefile.${cc.cc.CC}"
     "apps"
     "APP=ExHeat3D"
     ( if (numComm != null) then "NUM_COMM=${toString numComm}" else "" )
+    ( if (vectFlags != null) then "VECT_FLAGS=${toString vectFlags}" else "" )
   ];
 
   installPhase = ''