diff --git a/.gitignore b/.gitignore
index 1c48c8f83..79dc0eb93 100644
--- a/.gitignore
+++ b/.gitignore
@@ -74,10 +74,6 @@ resin*
 freeciv-web.project
 models.zip
 freeciv-web/src/main/webapp/build.txt
-freeciv-web/src/main/webapp/man
-freeciv-web/src/main/webapp/sounds
-freeciv-web/src/main/webapp/tileset
-freeciv-web/src/main/webapp/images/flags
 */__pycache__/*
 logs/
 tests/screenshot*.png
diff --git a/freeciv-web/README.md b/freeciv-web/README.md
index ece0b8bcb..e619dade8 100644
--- a/freeciv-web/README.md
+++ b/freeciv-web/README.md
@@ -5,6 +5,17 @@ This is the Freeciv web application, which consists of the Java servlets
 and filters for running the web client, JSP templates, javascript code
 and other web content. 
 
+Derived Sources
+===============
+
+Freeciv-web uses packet definitions, tilesets, and other resources
+derived from the original freeciv project, keeping these up to date by
+generating them during install from freeciv source.
+
+Scripts to generate these files are in `$freeciv-web/scripts` and they
+are generated to `$freeciv-web/freeciv-web/src/derived`. See the
+README.md in those directories for more info.
+
 Tomcat 8 + nginx setup
 ================================
 Freeciv-web supports the Tomcat 8 application server for hosting the Java web application.
diff --git a/freeciv-web/build-js.sh b/freeciv-web/build-js.sh
index be713ae0c..6101144ae 100755
--- a/freeciv-web/build-js.sh
+++ b/freeciv-web/build-js.sh
@@ -7,7 +7,11 @@ FCW_DEST=/var/lib/tomcat8/webapps/freeciv-web
 rm -rf target/freeciv-web/javascript/webclient.min.js.map
 rm -rf target/freeciv-web/javascript/webgl/libs/webgl-client.min.js.map
 
-mvn compile && cp target/freeciv-web/javascript/webclient.* "${FCW_DEST}"/javascript/ && cp target/freeciv-web/javascript/webgl/libs/webgl-client* "${FCW_DEST}"/javascript/webgl/libs/
+mvn compile && \
+echo "Copying target/javascript/webclient.* to ${FCW_DEST}/javascript" && \
+  cp target/freeciv-web/javascript/webclient.* "${FCW_DEST}"/javascript/ && \
+echo target/freeciv-web/javascript/webgl/libs/webgl-client* "${FCW_DEST}"/javascript/webgl/libs && \
+  cp target/freeciv-web/javascript/webgl/libs/webgl-client* "${FCW_DEST}"/javascript/webgl/libs/
 
 # update timestamp to clear browser cache.
 sed -i.bak -e "s/ts=\"/ts=\"1/" -e "s/\?ts=/\?ts=1/" "${FCW_DEST}"/webclient/index.jsp
diff --git a/freeciv-web/build.sh b/freeciv-web/build.sh
index ff49b9472..68ce347b5 100755
--- a/freeciv-web/build.sh
+++ b/freeciv-web/build.sh
@@ -1,21 +1,26 @@
 #!/bin/bash
 # builds Freeciv-web and copies the war file to Tomcat.
 
+DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" >/dev/null && pwd)"
+
 TOMCATDIR="/var/lib/tomcat8"
-ROOTDIR="$(pwd)/.."
+WEBAPP_DIR="${DIR}/target/freeciv-web"
 
 # Creating build.txt info file
 REVTMP="$(git rev-parse HEAD 2>/dev/null)"
 if test "x$REVTMP" != "x" ; then
   # This is build from git repository.
-  echo "This build is from freeciv-web commit: $REVTMP" > ${ROOTDIR}/freeciv-web/src/main/webapp/build.txt
+  mkdir -p "${WEBAPP_DIR}"
+  echo "This build is from freeciv-web commit: $REVTMP" > "${WEBAPP_DIR}/build.txt"
   if ! test $(git diff | wc -l) -eq 0 ; then
-    echo "It had local modifications." >> ${ROOTDIR}/freeciv-web/src/main/webapp/build.txt
+    echo "It had local modifications." >> "${WEBAPP_DIR}/build.txt"
   fi
-  date >> ${ROOTDIR}/freeciv-web/src/main/webapp/build.txt
+  date >> "${WEBAPP_DIR}/build.txt"
 else
-  rm -f ${ROOTDIR}/freeciv-web/src/main/webapp/build.txt
+  rm -f "${WEBAPP_DIR}/build.txt"
 fi
 
 echo "maven package"
-mvn flyway:migrate package && cp target/freeciv-web.war "${TOMCATDIR}/webapps/"
+mvn -B flyway:migrate package && \
+echo "Copying target/freeciv-web.war to ${TOMCATDIR}/webapps" && \
+  cp target/freeciv-web.war "${TOMCATDIR}/webapps/"
diff --git a/freeciv-web/pom.xml b/freeciv-web/pom.xml
index 3f8a0c198..8451871f8 100644
--- a/freeciv-web/pom.xml
+++ b/freeciv-web/pom.xml
@@ -13,6 +13,8 @@
 	<properties>
 		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
 		<timestamp>${maven.build.timestamp}</timestamp>
+		<derived-webapp.dir>${basedir}/src/derived/webapp</derived-webapp.dir>
+		<generated-js.dir>${project.build.directory}/generated-sources/javascript</generated-js.dir>
 	</properties>
 
 	<repositories>
@@ -122,6 +124,36 @@
 		<finalName>freeciv-web</finalName>
 		<!-- <pluginManagement> -->
 			<plugins>
+				<plugin>
+					<groupId>org.apache.maven.plugins</groupId>
+					<artifactId>maven-enforcer-plugin</artifactId>
+					<version>3.0.0-M2</version>
+					<executions>
+						<execution>
+							<id>enforce-files-exist</id>
+							<goals>
+								<goal>enforce</goal>
+							</goals>
+							<configuration>
+								<rules>
+									<requireFilesExist>
+										<files>
+											<file>${derived-webapp.dir}</file>
+										</files>
+										<message>
+Files derived from the original freeciv project not found as expected.
+
+Rerun the sync-js-hand.js script.
+
+										</message>
+									</requireFilesExist>
+								</rules>
+								<fail>true</fail>
+							</configuration>
+						</execution>
+					</executions>
+				</plugin>
+
 				<plugin>
 					<groupId>org.flywaydb</groupId>
 					<artifactId>flyway-maven-plugin</artifactId>
@@ -179,6 +211,54 @@
 					</executions>
 				</plugin>
 
+				<plugin>
+					<groupId>org.apache.maven.plugins</groupId>
+					<artifactId>maven-resources-plugin</artifactId>
+					<version>2.6</version>
+					<executions>
+						<execution>
+							<id>copy-generated-webapp-resources</id>
+							<phase>generate-sources</phase>
+							<goals>
+								<goal>copy-resources</goal>
+							</goals>
+							<configuration>
+								<outputDirectory>${project.build.directory}/${project.build.finalName}</outputDirectory>
+								<resources>
+									<resource>
+										<directory>${derived-webapp.dir}</directory>
+										<excludes>
+											<exclude>.gitignore</exclude>
+											<exclude>README.md</exclude>
+											<exclude>javascript/*.js</exclude>
+											<!-- NOT excluding `javascript/2dcavas/*` -->
+										</excludes>
+									</resource>
+								</resources>
+							</configuration>
+						</execution>
+					</executions>
+				</plugin>
+
+				<plugin>
+					<groupId>org.apache.maven.plugins</groupId>
+					<artifactId>maven-antrun-plugin</artifactId>
+					<version>1.8</version>
+					<executions>
+						<execution>
+							<id>create-generated-javascript-dir</id>
+							<phase>generate-sources</phase>
+							<goals>
+								<goal>run</goal>
+							</goals>
+							<configuration>
+								<target>
+									<mkdir dir="${generated-js.dir}"/>
+								</target>
+							</configuration>
+						</execution>
+					</executions>
+				</plugin>
 				<plugin>
 					<groupId>org.codehaus.mojo</groupId>
 					<artifactId>exec-maven-plugin</artifactId>
@@ -186,14 +266,14 @@
 					<executions>
 						<execution>
 							<id>Precompile Handlebars templates</id>
+							<phase>generate-sources</phase>
 							<goals>
 								<goal>exec</goal>
 							</goals>
 							<configuration>
 								<executable>handlebars</executable>
-								<commandlineArgs>src/main/webapp/webclient -e hbs -f src/main/webapp/javascript/hbs-templates.js --knownOnly</commandlineArgs>
+								<commandlineArgs>src/main/webapp/webclient -e hbs -f ${generated-js.dir}/hbs-templates.js --knownOnly</commandlineArgs>
 							</configuration>
-							<phase>generate-sources</phase>
 						</execution>
 					</executions>
 				</plugin>
@@ -236,7 +316,19 @@
 								<jsSourceDir>javascript</jsSourceDir>
 								<jsFinalFile>webclient.js</jsFinalFile>
 								<jsSourceFiles>
+									<!-- order is important: these must be before sources below -->
 									<jsSourceFile>libs/EventAggregator.js</jsSourceFile>
+									<jsSourceFile>libs/handlebars.runtime-v4.0.11.js</jsSourceFile>
+									<!-- these must be listed here, jsSourceIncludes doesn't work -->
+									<jsSourceFile>../../../derived/webapp/javascript/fc_events.js</jsSourceFile>
+									<jsSourceFile>../../../derived/webapp/javascript/freeciv-helpdata.js</jsSourceFile>
+									<jsSourceFile>../../../derived/webapp/javascript/packets.js</jsSourceFile>
+									<jsSourceFile>../../../derived/webapp/javascript/packhand_gen.js</jsSourceFile>
+									<jsSourceFile>../../../derived/webapp/javascript/soundset_spec.js</jsSourceFile>
+									<jsSourceFile>../../../derived/webapp/javascript/2dcanvas/tileset_spec_amplio2.js</jsSourceFile>
+									<jsSourceFile>../../../derived/webapp/javascript/2dcanvas/tileset_spec_isotrident.js</jsSourceFile>
+									<jsSourceFile>../../../derived/webapp/javascript/2dcanvas/tileset_spec_trident.js</jsSourceFile>
+									<jsSourceFile>../../../../target/generated-sources/javascript/hbs-templates.js</jsSourceFile>
 								</jsSourceFiles>
 								<jsSourceIncludes>
 									<jsSourceInclude>*.js</jsSourceInclude>
@@ -308,7 +400,6 @@
 					</executions>
 				</plugin>
 
-
 				<plugin>
 					<groupId>com.cj.jshintmojo</groupId>
 					<artifactId>jshint-maven-plugin</artifactId>
diff --git a/freeciv-web/src/derived/.gitignore b/freeciv-web/src/derived/.gitignore
new file mode 100755
index 000000000..8e7c00b78
--- /dev/null
+++ b/freeciv-web/src/derived/.gitignore
@@ -0,0 +1,6 @@
+# Ignore everything
+*
+
+# ...Except these
+!README.md
+!.gitignore
diff --git a/freeciv-web/src/derived/README.md b/freeciv-web/src/derived/README.md
new file mode 100755
index 000000000..c2f77ac85
--- /dev/null
+++ b/freeciv-web/src/derived/README.md
@@ -0,0 +1,21 @@
+# Freeciv Derived Sources
+
+This directory is for files derived from the `freeciv` project. It will
+be empty on initial checkout. Running the `freeciv-web` project install
+scripts will generate files here during the "Synchronizing Freeciv"
+process.
+
+Files generated here should be restricted to resources specifically
+derived from Freeciv, e.g. network protocol definitions, images/tilesets
+that are copied, etc.
+
+Such files are generated here, instead of within `target` dir, so that
+cleaning the maven project does not delete them - as the files are
+generated outside of maven, maven should not delete them during its
+standard `clean` phase.
+
+**ONLY** This README.md and a .gitignore file should ever be committed
+under this directory.
+
+To regenerate files in this directory, run the script:
+`${FREECIV_WEB}\scripts\sync-js-hand.sh`.
diff --git a/freeciv-web/src/main/webapp/javascript/libs/handlebars.runtime-v4.0.11.js b/freeciv-web/src/main/webapp/javascript/libs/handlebars.runtime-v4.0.11.js
index b893147c3..93cca6123 100644
--- a/freeciv-web/src/main/webapp/javascript/libs/handlebars.runtime-v4.0.11.js
+++ b/freeciv-web/src/main/webapp/javascript/libs/handlebars.runtime-v4.0.11.js
@@ -24,6 +24,7 @@ OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 THE SOFTWARE.
 
 */
+; // ensure concatenation does not cause this to be interpreted as an argument list
 (function webpackUniversalModuleDefinition(root, factory) {
 	if(typeof exports === 'object' && typeof module === 'object')
 		module.exports = factory();
@@ -1465,4 +1466,4 @@ return /******/ (function(modules) { // webpackBootstrap
 /***/ })
 /******/ ])
 });
-;
\ No newline at end of file
+;
diff --git a/scripts/install/install.sh b/scripts/install/install.sh
index 755934b80..97387f879 100755
--- a/scripts/install/install.sh
+++ b/scripts/install/install.sh
@@ -305,8 +305,9 @@ cd "${basedir}"/scripts/migration
 mig_scripts=([0-9]*)
 echo "${mig_scripts[-1]}" > checkpoint
 
+mkdir -p "${basedir}/freeciv-web/src/derived/webapp" && \
 "${basedir}"/scripts/sync-js-hand.sh -f "${basedir}/freeciv/freeciv" \
-  -o "${basedir}/freeciv-web/src/main/webapp" \
+  -o "${basedir}/freeciv-web/src/derived/webapp" \
   -d "${TOMCAT_HOME}/webapps/data" ||
   handle_error 6 "Failed to synchronize freeciv project"
 cd "${basedir}"/freeciv-web && ./build.sh