diff --git a/toolkit/Makefile b/toolkit/Makefile
index fdc37e401df..a04df8cd42c 100644
--- a/toolkit/Makefile
+++ b/toolkit/Makefile
@@ -155,7 +155,7 @@ VALIDATE_TOOLCHAIN_GPG ?= y
 endif
 endif
 
-TOOLCHAIN_GPG_VALIDATION_KEYS ?= $(wildcard $(SPECS_DIR)/azurelinux-repos/MICROSOFT-*-GPG-KEY) $(wildcard $(toolkit_root)/repos/MICROSOFT-*-GPG-KEY)
+TOOLCHAIN_GPG_VALIDATION_KEYS ?= $(wildcard $(PROJECT_ROOT)/SPECS/azurelinux-repos/MICROSOFT-*-GPG-KEY) $(wildcard $(toolkit_root)/repos/MICROSOFT-*-GPG-KEY)
 
 ######## COMMON MAKEFILE UTILITIES ########