diff --git a/install/build.ninja b/install/build.ninja
index 1418f2a..ecca938 100644
--- a/install/build.ninja
+++ b/install/build.ninja
@@ -4,11 +4,14 @@
 ######
 
 URL_OPAM  ="https://raw.github.com/ocaml/opam/master/shell/opam_installer.sh"
-URL_IRPF90="https://github.com/scemama/irpf90/archive/v1.7.2.tar.gz"
+URL_IRPF90="https://github.com/scemama/irpf90/archive/v1.6.7.tar.gz"
 URL_EZFIO ="https://gitlab.com/scemama/EZFIO/-/archive/v1.3.3/EZFIO-v1.3.3.tar.gz"
+#URL_IRPF90="https://github.com/scemama/irpf90/archive/v1.7.2.tar.gz"
 
-URL_ZMQ   ="https://github.com/zeromq/libzmq/archive/v4.2.5.tar.gz"
-URL_F77ZMQ="https://github.com/scemama/f77_zmq/archive/v4.2.5.tar.gz"
+URL_ZMQ   ="http://download.zeromq.org/zeromq-4.1.4.tar.gz"
+URL_F77ZMQ="https://github.com/scemama/f77_zmq/archive/4.1.4.tar.gz"
+#URL_ZMQ   ="https://github.com/zeromq/libzmq/archive/v4.2.5.tar.gz"
+#URL_F77ZMQ="https://github.com/scemama/f77_zmq/archive/v4.2.5.tar.gz"
 
 # Rules
 #######
@@ -49,7 +52,8 @@ build _build/irpf90.ok ../bin/irpman ../bin/irpf90: install | Downloads/irpf90.t
   target = irpf90
   descr = IRPF90
 
-build _build/zmq.ok ../lib/libzmq.a ../lib/libzmq.so.5 ../lib/libzmq.so ../lib/zmq.h ../lib/zmq_utils.h: install | Downloads/zmq.tar.gz 
+#build _build/zmq.ok ../lib/libzmq.a ../lib/libzmq.so.5 ../lib/libzmq.so ../lib/zmq.h ../lib/zmq_utils.h: install | Downloads/zmq.tar.gz 
+build _build/zmq.ok ../lib/libzmq.a ../lib/libzmq.so.4 ../lib/libzmq.so ../lib/zmq.h ../lib/zmq_utils.h: install | Downloads/zmq.tar.gz 
   target = zmq
   descr = ZeroMQ
 
diff --git a/install/scripts/install_f77_zmq.sh b/install/scripts/install_f77_zmq.sh
index d859a6c..cff0c7b 100755
--- a/install/scripts/install_f77_zmq.sh
+++ b/install/scripts/install_f77_zmq.sh
@@ -15,7 +15,8 @@ function _install()
   cd - 
   rm -f -- "${QMCCHEM_PATH}"/src/ZMQ/f77_zmq.h "${QMCCHEM_PATH}"/lib/libf77zmq.a "${QMCCHEM_PATH}"/lib/libf77zmq.so
   cp "${BUILD}"/libf77zmq.{a,so} ../lib/ 
-  cp "${BUILD}"/f77_zmq_free.h ../src/ZMQ/f77_zmq.h
+  cp "${BUILD}"/f77_zmq.h ../src/ZMQ/ 
+#  cp "${BUILD}"/f77_zmq_free.h ../src/ZMQ/f77_zmq.h
   return 0
 }
 
diff --git a/install/scripts/install_zmq.sh b/install/scripts/install_zmq.sh
index 4196b78..e2fab9c 100755
--- a/install/scripts/install_zmq.sh
+++ b/install/scripts/install_zmq.sh
@@ -16,10 +16,10 @@ function _install()
   make install
   cd - 
   rm -f -- "${QMCCHEM_PATH}"/lib/libzmq.{a,so,so.$LIBVERSION} 
-# cp "${BUILD}"/.libs/libzmq.a "${QMCCHEM_PATH}"/lib/ 
-# cp "${BUILD}"/.libs/libzmq.so "${QMCCHEM_PATH}"/lib/libzmq.so.$LIBVERSION	
-  cp "${BUILD}"/src/.libs/libzmq.a "${QMCCHEM_PATH}"/lib/ 
-  cp "${BUILD}"/src/.libs/libzmq.so "${QMCCHEM_PATH}"/lib/libzmq.so.$LIBVERSION
+ cp "${BUILD}"/.libs/libzmq.a "${QMCCHEM_PATH}"/lib/ 
+ cp "${BUILD}"/.libs/libzmq.so "${QMCCHEM_PATH}"/lib/libzmq.so.$LIBVERSION	
+#  cp "${BUILD}"/src/.libs/libzmq.a "${QMCCHEM_PATH}"/lib/ 
+#  cp "${BUILD}"/src/.libs/libzmq.so "${QMCCHEM_PATH}"/lib/libzmq.so.$LIBVERSION
   cp "${BUILD}"/include/{zmq,zmq_utils}.h "${QMCCHEM_PATH}"/lib/
   cd "${QMCCHEM_PATH}"/lib
   ln libzmq.so.$LIBVERSION libzmq.so || cp libzmq.so.$LIBVERSION libzmq.so
diff --git a/ocaml/Qmcchem_config.ml b/ocaml/Qmcchem_config.ml
index 3a82387..d9f302d 100644
--- a/ocaml/Qmcchem_config.ml
+++ b/ocaml/Qmcchem_config.ml
@@ -83,7 +83,7 @@ let hostname = lazy (
   try
     Unix.gethostname ()
   with
-  | _ -> "127.0.0.1"
+  | _ -> "localhost"
 )
 
 
diff --git a/ocaml/Qmcchem_run.ml b/ocaml/Qmcchem_run.ml
index 3960ed4..33c9e12 100644
--- a/ocaml/Qmcchem_run.ml
+++ b/ocaml/Qmcchem_run.ml
@@ -35,7 +35,7 @@ let full_run ?(start_dataserver=true) ezfio_filename  =
   if (start_dataserver) then
     begin
       (* Reset socket address in EZFIO *)
-      Ezfio.set_simulation_http_server "tcp://127.0.0.1:65534";
+      Ezfio.set_simulation_http_server "tcp://localhost:65534";
 
 
       (* Start the data server *)
@@ -67,7 +67,7 @@ let full_run ?(start_dataserver=true) ezfio_filename  =
            Zmq.Socket.send socket (Message.(to_string Test));
            Zmq.Socket.recv socket
          ) with
-       | Unix.Unix_error (_,_,_) ->
+       | Unix.Unix_error _ ->
            begin
              "Failed"
            end
diff --git a/src/PROPERTIES/properties.irp.f b/src/PROPERTIES/properties.irp.f
index 999ce14..f50473f 100644
--- a/src/PROPERTIES/properties.irp.f
+++ b/src/PROPERTIES/properties.irp.f
@@ -59,7 +59,7 @@ END_SHELL
 ! DIMENSIONS
 !==========================================================================!
 
-BEGIN_SHELL [ /usr/bin/python2 ]
+BEGIN_SHELL [ /usr/bin/env python2 ]
 from properties import *
 make_dims()
 END_SHELL
diff --git a/src/ezfio_interface.irp.f b/src/ezfio_interface.irp.f
index 7b1888b..950b66b 100644
--- a/src/ezfio_interface.irp.f
+++ b/src/ezfio_interface.irp.f
@@ -1,4 +1,4 @@
-BEGIN_SHELL [ /usr/bin/python2 ]
+BEGIN_SHELL [ /usr/bin/env python2 ]
 
 data = [ \
 ("electrons_elec_coord_pool_size"  , "integer"       , "" ),