diff --git a/src/test/compiled.md5sum b/src/test/compiled.md5sum
index 20f6dd41f..b5072c7c7 100644
--- a/src/test/compiled.md5sum
+++ b/src/test/compiled.md5sum
@@ -770,8 +770,6 @@ ac269ce33e9a701493405e639d2f5a4e  correct/switch/gcc/switch.gts
 792778f0dcf6354ff39cf8ee0a0f2bb0  correct/switch/gcc/switch.relf
 17d72c6a7a72b8018879e5c445636de4  correct/syscall/clang/a.out
 db97697fa77dfd2f129a15c06b9aebc7  correct/syscall/clang_O2/a.out
-1d0d20d3ebe7600f619de3032febe92e  correct/syscall/clang_O2/syscall.adt
-f7bdf574c930ad23d6750de08179986d  correct/syscall/clang_O2/syscall.bir
 f56862bf3e8ccdb223a4754b9dfe5af4  correct/syscall/clang_O2/syscall.gts
 a086bac2a1d8e547c1cb5a7eeb69c358  correct/syscall/clang_O2/syscall.relf
 ce1cc85de1f94735a4484434eb043d48  correct/syscall/clang/syscall.adt
diff --git a/src/test/compiled.url.txt b/src/test/compiled.url.txt
index 9668131d7..055a11083 100644
--- a/src/test/compiled.url.txt
+++ b/src/test/compiled.url.txt
@@ -1,4 +1,4 @@
-https://files.catbox.moe/1ar17y.zst
+https://files.catbox.moe/bz0wwv.zst
 
 # this file should have a URL as its first line
 # and a sha1sum as its last line. all other
@@ -9,4 +9,4 @@ https://files.catbox.moe/1ar17y.zst
 # 
 # make sure to update both URL and sha1sum simultaneously.
 
-f9534fa64a116cf447f985ee14767aa1f41fe6d5  compiled.tar.zst
+5103a621a9af5407b149edda077c154a8a4cbd23  compiled.tar.zst
diff --git a/src/test/correct/syscall/clang_O2/syscall.md5sum b/src/test/correct/syscall/clang_O2/syscall.md5sum
index c0619788a..dfe3413b4 100644
--- a/src/test/correct/syscall/clang_O2/syscall.md5sum
+++ b/src/test/correct/syscall/clang_O2/syscall.md5sum
@@ -1,5 +1,3 @@
 db97697fa77dfd2f129a15c06b9aebc7  correct/syscall/clang_O2/a.out
-1d0d20d3ebe7600f619de3032febe92e  correct/syscall/clang_O2/syscall.adt
-f7bdf574c930ad23d6750de08179986d  correct/syscall/clang_O2/syscall.bir
 a086bac2a1d8e547c1cb5a7eeb69c358  correct/syscall/clang_O2/syscall.relf
 f56862bf3e8ccdb223a4754b9dfe5af4  correct/syscall/clang_O2/syscall.gts
diff --git a/src/test/correct/syscall/config.mk b/src/test/correct/syscall/config.mk
index ba94daccb..4f0306b16 100644
--- a/src/test/correct/syscall/config.mk
+++ b/src/test/correct/syscall/config.mk
@@ -1 +1,4 @@
-ENABLED_COMPILERS = clang clang_O2 gcc gcc_O2
\ No newline at end of file
+ENABLED_COMPILERS = clang clang_O2 gcc gcc_O2
+
+# disable BAP for clang_O2
+LIFT_ARTEFACTS_clang_O2 = $(COMMON_ARTEFACTS) $(GTIRB_ARTEFACTS)
diff --git a/src/test/make/lift-directories.mk b/src/test/make/lift-directories.mk
index 785283e8f..1402ef5af 100644
--- a/src/test/make/lift-directories.mk
+++ b/src/test/make/lift-directories.mk
@@ -2,12 +2,18 @@
 
 # Run from the directory basil/src/test/*/test_case/
 
+# - lift-directories.mk: sets NAME
+#   - config.mk: sets ENABLED_COMPILERS
+#   - exec: gcc_pic.mk: sets CC / CFLAGS
+#     - lift.mk: sets CONFIG to compiler variant
+
 NAME := $(notdir $(shell pwd))
 
 COMMON_ARTEFACTS := $(NAME).relf
 BAP_ARTEFACTS := $(NAME).adt $(NAME).bir
 GTIRB_ARTEFACTS := $(NAME).gts
 
+ALL_ARTEFACTS := $(BAP_ARTEFACTS) $(COMMON_ARTEFACTS) $(GTIRB_ARTEFACTS)
 # - means continue if it doesnt exist
 -include ./config.mk
 
diff --git a/src/test/make/lift.mk b/src/test/make/lift.mk
index c724c8b4c..e4761a6e9 100644
--- a/src/test/make/lift.mk
+++ b/src/test/make/lift.mk
@@ -3,6 +3,16 @@
 
 MD5SUM_FILE := $(NAME).md5sum
 
+# compilation variant name. be careful of trailing whitespace!
+CONFIG := $(notdir $(realpath .))
+
+# override with config-specific lifter selection
+ifdef LIFT_ARTEFACTS_$(CONFIG)
+	LIFT_ARTEFACTS := $(LIFT_ARTEFACTS_$(CONFIG))
+endif
+
+# $(info $(realpath .) config=$(CONFIG) artefacts=$(LIFT_ARTEFACTS))
+
 all: $(LIFT_ARTEFACTS)
 
 $(NAME).relf: a.out