diff --git a/mk/perf.mk b/mk/perf.mk
index a67cf453e2a..75b985a6ffe 100644
--- a/mk/perf.mk
+++ b/mk/perf.mk
@@ -2,7 +2,7 @@
 ifdef CFG_PERF_TOOL
 rustc-perf$(X): $(CFG_HOST_TRIPLE)/stage2/bin/rustc$(X)
 	@$(call E, perf compile: $@)
-	$(PERF_STAGE2_T_$(CFG_HOST_TRIPLE)_H_$(CFG_HOST_TRIPLE)) --lib \
+	$(PERF_STAGE2_T_$(CFG_HOST_TRIPLE)_H_$(CFG_HOST_TRIPLE)) \
 		 -o $@ $(COMPILER_CRATE) >rustc-perf.err 2>&1
 	$(Q)rm -f $(LIBRUSTC_GLOB)
 else
diff --git a/mk/target.mk b/mk/target.mk
index a728d90c13e..45351798711 100644
--- a/mk/target.mk
+++ b/mk/target.mk
@@ -31,14 +31,14 @@ $$(TLIB$(1)_T_$(2)_H_$(3))/$$(CFG_CORELIB): \
 		$$(CORELIB_CRATE) $$(CORELIB_INPUTS) \
 		$$(TSREQ$(1)_T_$(2)_H_$(3))
 	@$$(call E, compile_and_link: $$@)
-	$$(STAGE$(1)_T_$(2)_H_$(3)) --no-core --lib -o $$@ $$< && touch $$@
+	$$(STAGE$(1)_T_$(2)_H_$(3)) --no-core -o $$@ $$< && touch $$@
 
 $$(TLIB$(1)_T_$(2)_H_$(3))/$$(CFG_STDLIB): \
 		$$(STDLIB_CRATE) $$(STDLIB_INPUTS) \
         $$(TLIB$(1)_T_$(2)_H_$(3))/$$(CFG_CORELIB) \
 		$$(TSREQ$(1)_T_$(2)_H_$(3))
 	@$$(call E, compile_and_link: $$@)
-	$$(STAGE$(1)_T_$(2)_H_$(3)) --lib -o $$@ $$< && touch $$@
+	$$(STAGE$(1)_T_$(2)_H_$(3)) -o $$@ $$< && touch $$@
 
 $$(TLIB$(1)_T_$(2)_H_$(3))/$$(CFG_RUSTLLVM): \
 		rustllvm/$(2)/$$(CFG_RUSTLLVM)
@@ -58,7 +58,7 @@ $$(TLIB$(1)_T_$(2)_H_$(3))/$$(CFG_LIBRUSTC):		\
 		$$(TCORELIB_DEFAULT$(1)_T_$(2)_H_$(3))      \
 		$$(TSTDLIB_DEFAULT$(1)_T_$(2)_H_$(3))
 	@$$(call E, compile_and_link: $$@)
-	$$(STAGE$(1)_T_$(2)_H_$(3))  --lib -o $$@ $$< && touch $$@
+	$$(STAGE$(1)_T_$(2)_H_$(3)) -o $$@ $$< && touch $$@
 
 endef