diff --git a/.travis.yml b/.travis.yml
index a06b17454..1dd3e89a5 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -5,6 +5,9 @@ before_script:
   - WGET="travis_retry wget --continue --tries=20 --waitretry=10 --retry-connrefused --no-dns-cache --timeout 300"
   - sudo apt-get -qq update
 
+  ## Support building a binary that is identical to the CI
+  - echo -n "Contiki will be compiled with RELSTR=" ; git --git-dir .git describe --tags --always
+
   ## Install msp430 toolchain
   - sudo apt-get -qq install lib32z1
   - $WGET http://adamdunkels.github.io/contiki-fork/mspgcc-4.7.0-compiled.tar.bz2 &&
diff --git a/Makefile.include b/Makefile.include
index 11bf809b9..63c3e63df 100644
--- a/Makefile.include
+++ b/Makefile.include
@@ -35,6 +35,13 @@ ifndef HOST_OS
   endif
 endif
 
+#More debug information when running in CI
+ifdef CI
+  ifeq ($(CI),true)
+    V = 1
+  endif
+endif
+
 usage:
 	@echo "make MAKETARGETS... [TARGET=(TARGET)] [savetarget] [targets]"
 
@@ -152,8 +159,10 @@ CFLAGS += ${addprefix -I,$(SOURCEDIRS) $(CONTIKI)}
 
 ### Check for a git repo and pass version if found
 ### git.exe in Windows cmd shells may require no stderr redirection
-#RELSTR=${shell git describe --tags}
-RELSTR:=${shell git --git-dir ${CONTIKI}/.git describe --tags 2>/dev/null}
+ifndef RELSTR
+RELSTR:=${shell git --git-dir ${CONTIKI}/.git describe --tags --always}
+endif
+
 ifneq ($(RELSTR),)
 CFLAGS += -DCONTIKI_VERSION_STRING=\"Contiki-$(RELSTR)\"
 endif
diff --git a/regression-tests/simexec.sh b/regression-tests/simexec.sh
index cb6d5e5b0..66f81fd6a 100755
--- a/regression-tests/simexec.sh
+++ b/regression-tests/simexec.sh
@@ -54,12 +54,15 @@ while (( "$#" )); do
 
 
 	#Verbose output when using CI
-	if [ "$CI" = "true" ];  then 
-		echo "==== COOJA.log ====" ; cat COOJA.log; 
-		echo "==== COOJA.testlog ====" ; cat COOJA.testlog; 
-	else  
-		tail -50 COOJA.log ; 
-	fi; 
+	if [ "$CI" = "true" ]; then
+		echo "==== COOJA.log ====" ; cat COOJA.log;
+		echo "==== COOJA.testlog ====" ; cat COOJA.testlog;
+		echo "==== Files used for simulation (sha1sum) ===="
+		grep "Loading firmware from:" COOJA.log | cut -d " " -f 10 | uniq  | xargs -r sha1sum
+		grep "Creating core communicator between Java class" COOJA.log | cut -d " " -f 17 | uniq  | xargs -r sha1sum
+	else
+		tail -50 COOJA.log ;
+	fi;
 
 	mv COOJA.testlog $BASENAME.$RANDOMSEED.faillog
 
diff --git a/tools/cooja/java/org/contikios/cooja/contikimote/ContikiMoteType.java b/tools/cooja/java/org/contikios/cooja/contikimote/ContikiMoteType.java
index c80c375b1..eef80bbc8 100644
--- a/tools/cooja/java/org/contikios/cooja/contikimote/ContikiMoteType.java
+++ b/tools/cooja/java/org/contikios/cooja/contikimote/ContikiMoteType.java
@@ -403,7 +403,7 @@ public class ContikiMoteType implements MoteType {
     }
 
     // Allocate core communicator class
-    logger.info("Creating core communicator between Java class '" + javaClassName + "' and Contiki library '" + getContikiFirmwareFile().getName() + "'");
+    logger.info("Creating core communicator between Java class " + javaClassName + " and Contiki library '" + getContikiFirmwareFile().getPath() + "");
     myCoreComm = CoreComm.createCoreComm(this.javaClassName, getContikiFirmwareFile());
 
     /* Parse addresses using map file