diff --git a/README.md b/README.md
index d099084..7d9a7ab 100644
--- a/README.md
+++ b/README.md
@@ -10,7 +10,7 @@ This is the ircDDB Gateway. It allows a D-Star Repeater to interface into callsi
 * XLX reflectors.
 * CCS7 routing.
 * D-RATS data transfers.
-* Gateway DPRS data to aprs.fi.
+* Gateway DPRS data to APRS-IS.
 * Full multi lingual text and voice announcements.
 * DTMF or UR call control.
 * Remote control interface.
@@ -22,3 +22,24 @@ There are many external programs that allow for inserting voice or text messages
 They all build on 32-bit and 64-bit Linux as well as on Windows using Visual Studio 2017 on x86 and x64.
 
 This software is licenced under the GPL v2.
+
+# Build and installing
+## Regular build
+```shell
+make
+make -f MakefileGUI #only required if you want to build the GUI programs
+sudo make install
+```
+## Drop-in replacement for dl5di OpenDV packages
+This will conpile the program to be used as a drop in replacement for the no longer maintained DL5DI OpenDV packages. Systemd files to run ircddbgatewayd as daemon will also be installed.
+```shell
+export TARGET=opendv
+make
+make -f MakefileGUI #only required if you want to build the GUI programs
+sudo make install
+```
+Now you should edit the configuration in the file /etc/ircddbgateway
+```shell
+sudo systemctl enable ircddbgatewayd.service #enable service
+sudo service ircddbgatewayd start
+```