diff --git a/debug-client.sh b/debug-client.sh
index d593cde..a24fb7a 100755
--- a/debug-client.sh
+++ b/debug-client.sh
@@ -1,6 +1,11 @@
 #!/bin/bash
 
-mvn -DskipTests=true install # needed for pairgoth-common
+VERSION=$(grep '<version>' pom.xml | head -1 | egrep  -o '[0-9.]+')
+
+if [ !-f "$HOME/.m2/repository/org/jeudego/pairgoth/pairgoth-common/$VERSION/pairgoth-common-$VERSION.jar" ]
+then
+    mvn -DskipTests=true install # needed for pairgoth-common    
+fi
 
 trap 'kill $CSSWATCH; exit' INT
 ( cd view-webapp; ./csswatch.sh ) &
diff --git a/debug-server.sh b/debug-server.sh
index c7367c9..9693505 100755
--- a/debug-server.sh
+++ b/debug-server.sh
@@ -1,6 +1,11 @@
 #!/bin/bash
 
-mvn -DskipTests=true install # needed for pairgoth-common
+VERSION=$(grep '<version>' pom.xml | head -1 | egrep  -o '[0-9.]+')
+
+if [ !-f "$HOME/.m2/repository/org/jeudego/pairgoth/pairgoth-common/$VERSION/pairgoth-common-$VERSION.jar" ]
+then
+    mvn -DskipTests=true install # needed for pairgoth-common    
+fi
 
 export MAVEN_OPTS="-Xdebug -Xrunjdwp:transport=dt_socket,server=y,suspend=n,address=*:5005"
 mvn -DskipTests=true --projects api-webapp package jetty:run -Dpairgoth.mode=server