diff --git a/gputils.spec b/gputils.spec
index 3631f7c..091bfc0 100644
--- a/gputils.spec
+++ b/gputils.spec
@@ -1,18 +1,19 @@
+%define dirver %(echo %version | cut -d_ -f1)
+%define pkgver %(echo %version | tr _ -)
 Name:          gputils
-Version:       1.5.0
+Version:       1.5.0_1
 Release:       1mamba
 Summary:       A collection of tools for the Microchip (TM) PIC microcontrollers
 Group:         System/Tools
 Vendor:        openmamba
 Distribution:  openmamba
 Packager:      Silvan Calarco <silvan.calarco@mambasoft.it>
-URL:           http://gputils.sourceforge.net
-Source:        http://downloads.sourceforge.net/project/gputils/gputils/%{version}/gputils-%{version}.tar.gz
+URL:           https://gputils.sourceforge.net
+Source:        http://downloads.sourceforge.net/project/gputils/gputils/%{dirver}/gputils-%{pkgver}.tar.gz
 License:       GPL
 ## AUTOBUILDREQ-BEGIN
 BuildRequires: glibc-devel
 ## AUTOBUILDREQ-END
-BuildRoot:     %{_tmppath}/%{name}-%{version}-root
 
 %description
 GPUTILS is a collection of tools for the Microchip (TM) PIC microcontrollers. It includes gpasm, gplink, and gplib. It's distributed under the terms of the GNU Public License. There are other GNU PIC tools available such as gpsim, a gputils compatible simulator.
@@ -20,7 +21,7 @@ GPUTILS is a collection of tools for the Microchip (TM) PIC microcontrollers. It
 %debug_package
 
 %prep
-%setup -q
+%setup -q -n %{name}-%{dirver}
 
 %build
 %configure
@@ -30,6 +31,8 @@ GPUTILS is a collection of tools for the Microchip (TM) PIC microcontrollers. It
 [ "%{buildroot}" != / ] && rm -rf "%{buildroot}"
 %makeinstall
 
+rm -rf %{buildroot}%{_docdir}/gputils-%{dirver}
+
 %clean
 [ "%{buildroot}" != / ] && rm -rf "%{buildroot}"
 
@@ -52,6 +55,9 @@ GPUTILS is a collection of tools for the Microchip (TM) PIC microcontrollers. It
 %doc AUTHORS COPYING
 
 %changelog
+* Sat Apr 10 2021 Silvan Calarco <silvan.calarco@mambasoft.it> 1.5.0_1-1mamba
+- update to 1.5.0_1
+
 * Tue Sep 20 2016 Automatic Build System <autodist@mambasoft.it> 1.5.0-1mamba
 - automatic version update by autodist