diff --git a/build.ninja b/build.ninja
index cd2a4ca..b949c98 100644
--- a/build.ninja
+++ b/build.ninja
@@ -68,7 +68,7 @@ build qmcchem.tar.gz: create_archive
 # Ocaml
 # -----
 
-build ocaml/generated.ninja : compile_ocaml_dep | EZFIO/Ocaml/ezfio.ml always
+build ocaml/generated.ninja : compile_ocaml_dep | EZFIO/Ocaml/ezfio.ml always || src/irpf90.make
 build ocaml/qmcchem : compile_ocaml | ocaml/generated.ninja EZFIO/Ocaml/ezfio.ml 
   target = qmcchem
 
diff --git a/configure.sh b/configure.sh
index 5da8621..7b618cf 100755
--- a/configure.sh
+++ b/configure.sh
@@ -19,7 +19,9 @@ then
   touch _build/ninja.ok
 fi
 touch "${QMCCHEM_PATH}"/{src,ocaml}/.ls_md5
-exec "${QMCCHEM_PATH}"/bin/ninja "$@"
+"${QMCCHEM_PATH}"/bin/ninja "$@"
+
+cd "${QMCCHEM_PATH}"
 
 if [[ ! -f make.config ]]
 then
@@ -34,9 +36,10 @@ fi
 
 echo "====================================================================="
 echo "Configuration OK."
-echo "Now, source the qmcchemrc file:"
+echo "Now, source the qmcchemrc file and build the program:"
 echo ""
 echo "source qmcchemrc"
+echo "ninja"
 echo ""
 echo "====================================================================="