build system: fix IDF_VER for projects outside of ESP-IDF tree

diff --git a/make/project.mk b/make/project.mk
index ee8c0779438152b33dbbca09d671c0a0059f9e29..43dab767a47788a52cae598d63357ad97ee7a9c3 100644 (file)
--- a/make/project.mk
+++ b/make/project.mk
@@ -178,7 +178,7 @@ endif
 
 
 # Git version of ESP-IDF (of the form v1.0-285-g5c4f707)
-IDF_VER := $(shell git describe)
+IDF_VER := $(shell git -C $(IDF_PATH) describe)
 
 # Set default LDFLAGS