diff --git a/Makefile b/Makefile
index 325fa854..e163aeba 100644
--- a/Makefile
+++ b/Makefile
@@ -26,21 +26,21 @@ cbindd:
 	cd cbind&& $(MAKE) lib 
 
 install: all
-	$(SHELL) ./mkdir.sh  $(INSTALL_INCLUDEDIR) &&\
+	mkdir -p $(INSTALL_INCLUDEDIR) &&\
 	   $(INSTALL_DATA) Make.inc  $(INSTALL_INCLUDEDIR)/Make.inc.psblas
-	$(SHELL) ./mkdir.sh  $(INSTALL_LIBDIR) &&\
+	mkdir -p $(INSTALL_LIBDIR) &&\
 	   $(INSTALL_DATA) lib/*.a  $(INSTALL_LIBDIR)
-	$(SHELL) ./mkdir.sh  $(INSTALL_MODULESDIR) && \
+	mkdir -p $(INSTALL_MODULESDIR) && \
 	   $(INSTALL_DATA) modules/*$(.mod) $(INSTALL_MODULESDIR)
-	$(SHELL) ./mkdir.sh  $(INSTALL_INCLUDEDIR) && \
+	mkdir -p $(INSTALL_INCLUDEDIR) && \
 	   $(INSTALL_DATA) include/*.h $(INSTALL_INCLUDEDIR)
-	$(SHELL) ./mkdir.sh  $(INSTALL_DOCSDIR) && \
+	mkdir -p $(INSTALL_DOCSDIR) && \
 	   /bin/cp -fr docs/*pdf docs/html $(INSTALL_DOCSDIR)
-	$(SHELL) ./mkdir.sh  $(INSTALL_DOCSDIR) && \
+	mkdir -p $(INSTALL_DOCSDIR) && \
 	   $(INSTALL_DATA) README.md LICENSE  $(INSTALL_DOCSDIR)
-	$(SHELL) ./mkdir.sh  $(INSTALL_SAMPLESDIR) && \
+	mkdir -p $(INSTALL_SAMPLESDIR) && \
 	     /bin/cp -fr test/pargen test/fileread test/kernel $(INSTALL_SAMPLESDIR) && \
-	     ./mkdir.sh $(INSTALL_SAMPLESDIR)/cbind && /bin/cp -fr cbind/test/pargen/* $(INSTALL_SAMPLESDIR)/cbind
+	     mkdir -p $(INSTALL_SAMPLESDIR)/cbind && /bin/cp -fr cbind/test/pargen/* $(INSTALL_SAMPLESDIR)/cbind
 clean: 
 	cd base && $(MAKE) clean
 	cd prec && $(MAKE) clean 
diff --git a/mkdir.sh b/mkdir.sh
deleted file mode 100755
index 0a9820ea..00000000
--- a/mkdir.sh
+++ /dev/null
@@ -1,20 +0,0 @@
-#!/bin/sh
-
-dir=$1;
-
-dir_cmp=`echo $dir | sed 's./. /.g'`
-if [ ! -d $dir ]
-then
-  path=''
-  for cmp in $dir_cmp ;   do
-      path="$path$cmp";
-      if [ ! -d $path ] ; then 
-	 mkdir $path; rc=$?;
-	 if [ $rc != 0 ] ; then 
-	    echo "Error while making directory $path "
-	    exit 1
-	 fi
-      fi
-  done
-fi
-        
\ No newline at end of file