diff --git a/README.md b/README.md
index ad46b28..27b1262 100644
--- a/README.md
+++ b/README.md
@@ -25,7 +25,7 @@ The I2P router expects to find some resources in specific places.  The legacy I2
    * All router certificates
    * GeoIP database
    * Custom Launcher
-1. Enumerate these resources and generate a file called `resources.csv`.  The format is CSV file where the first entry is the path that the classloader will use to locate the file, and the second entry is the path under the preferences directory where the resource should be copied.  Add this file in the .jar built in step 1.
+1. Enumerate these resources and generate a file called `resources.csv`.  The format is CSV file where the first entry is the path that the classloader will use to locate the file, the second entry is the path under the preferences directory where the resource should be copied, and the third entry indicates whether to overwrite any existing files (true|false).  Add this file in the .jar built in step 1.
 1. Use a custom main class `net.i2p.router.PackageLauncher` which reads the above list and copies each resource to the appropriate path under the current user's preferences directory, which is OS-dependent.
 1. The custom main class will also set any system properties necessary for I2P to work, then invoke the "real" main class `net.i2p.router.RouterLaunch`.
 1. The compiled custom main class gets added to the .jar as well.
diff --git a/build.sh b/build.sh
index 94c5bde..5f48369 100755
--- a/build.sh
+++ b/build.sh
@@ -1,4 +1,5 @@
 #!/bin/bash
+set -e 
 
 if [ -z "${JAVA_HOME}" ]; then
     echo "JAVA_HOME needs to point to Java 14+"
@@ -17,15 +18,17 @@ I2P_PKG=$HERE/../i2p.i2p/pkg-temp
 echo "preparing resources.csv"
 mkdir build
 cd $RES_DIR
-find certificates -name *.crt -exec echo '{},{}' >> $HERE/build/resources.csv \;
+find certificates -name *.crt -exec echo '{},{},true' >> $HERE/build/resources.csv \;
 cd portable/configs
-find . -name '*.config' -exec echo 'config/{},{}' >> $HERE/build/resources.csv \;
-echo "config/hosts.txt,hosts.txt" >> $HERE/build/resources.csv
+find . -name '*.config' -exec echo 'config/{},{},false' >> $HERE/build/resources.csv \;
+echo "config/hosts.txt,hosts.txt,false" >> $HERE/build/resources.csv
 echo "preparing webapps"
 cd $I2P_PKG
-find webapps -name '*.war' -exec echo '{},{}' >> $HERE/build/resources.csv \;
+find webapps -name '*.war' -exec echo '{},{},true' >> $HERE/build/resources.csv \;
+# TODO add others
 cd $HERE
-echo "geoip/GeoLite2-Country.mmdb,geoip/GeoLite2-Country.mmdb" >> build/resources.csv
+echo "geoip/GeoLite2-Country.mmdb,geoip/GeoLite2-Country.mmdb,true" >> build/resources.csv
+# TODO: decide on blocklist.txt
 
 sed -i 's|\./||g' build/resources.csv
 
diff --git a/java/net/i2p/router/PackageLauncher.java b/java/net/i2p/router/PackageLauncher.java
index f689d93..bf15d0d 100644
--- a/java/net/i2p/router/PackageLauncher.java
+++ b/java/net/i2p/router/PackageLauncher.java
@@ -64,6 +64,7 @@ public class PackageLauncher {
         String []split = description.split(",");
         String url = split[0];
         String target = split[1];
+        boolean overwrite = Boolean.parseBoolean(split[2]);
 
         var resource = PackageLauncher.class.getClassLoader().getResourceAsStream(url);
 
@@ -77,8 +78,14 @@ public class PackageLauncher {
             targetDir.mkdirs();
         else if (!targetDir.isDirectory())
             throw new Exception(targetDir + " exists but not a directory.  Please get it out of the way");
+<<<<<<< HEAD
 	System.out.println(targetFile.toPath());
         Files.copy(resource, targetFile.toPath(), StandardCopyOption.REPLACE_EXISTING);
+=======
+
+        if (!targetFile.exists() || overwrite)
+            Files.copy(resource, targetFile.toPath(), StandardCopyOption.REPLACE_EXISTING);
+>>>>>>> 52dbe4c90a0a27229bc391318dcd06254b6936e6
     }
 }