diff --git a/Makefile b/Makefile
index 5eb3e92a..415c846f 100644
--- a/Makefile
+++ b/Makefile
@@ -35,13 +35,13 @@ ${DIR_EXPORT}/%.qcow2:
 context-linux: $(patsubst %, context-linux/out/%, $(LINUX_CONTEXT_PACKAGES))
 	@${INFO} "Generate context-linux done"
 
-context-linux/out/%:
+context-linux/out/%: ${CONTEXT_LINUX_SOURCES}
 	cd context-linux; ./generate-all.sh
 
 context-windows: $(patsubst %, context-windows/out/%, $(WINDOWS_CONTEXT_PACKAGES))
 	@${INFO} "Generate context-windows done"
 
-context-windows/out/%:
+context-windows/out/%: ${CONTEXT_WINDOWS_SOURCES}
 	cd context-windows; ./generate-all.sh
 
 clean:
diff --git a/Makefile.config b/Makefile.config
index 0e49530b..5f34a413 100644
--- a/Makefile.config
+++ b/Makefile.config
@@ -48,13 +48,14 @@ LINUX_CONTEXT_PACKAGES := one-context_${VERSION}-${RELEASE}.deb \
     one-context-linux-${VERSION}-${RELEASE}.iso
 
 LINUX_CONTEXT_PACKAGES_FULL := $(patsubst %, context-linux/out/%, $(LINUX_CONTEXT_PACKAGES))
+CONTEXT_LINUX_SOURCES := $(shell find context-linux/src)
 
 # this needs to match context-windows/generate-all.sh products
 WINDOWS_CONTEXT_PACKAGES := one-context-${VERSION}.msi \
     one-context-${VERSION}.iso
 
 WINDOWS_CONTEXT_PACKAGES_FULL := $(patsubst %, context-windows/out/%, $(WINDOWS_CONTEXT_PACKAGES))
-
+CONTEXT_WINDOWS_SOURCES := $(shell find context-windows/src)
 
 # logging func
 INFO=sh -c 'if [ $(VERBOSE) = 1 ]; then  echo [INFO] $$1; fi' INFO