-VERBOSE=true
-SOURCE_RULES=git
-SOURCE_ARGS=https://github.com/bagder/curl.git
-BUILD_RULES=gnu
-REPORT_RULES=mail
+BTR_VERBOSE=true
+BTR_SOURCE_RULES=git
+BTR_SOURCE_ARGS=https://github.com/bagder/curl.git
+BTR_BUILD_RULES=gnu
+BTR_REPORT_RULES=mail