diff --git a/src/stdlib.make.in b/src/stdlib.make.in
index cb89fa36d4..89451f813f 100644
--- a/src/stdlib.make.in
+++ b/src/stdlib.make.in
@@ -2,14 +2,14 @@ SHELL := /usr/bin/env bash -euo pipefail
 
 # LEAN_OPTS: don't use native code (except for primitives) since it is from the previous stage
 # MORE_DEPS: rebuild the stdlib whenever the compiler has changed
-LEANMAKE_OPTS+=\
+LEANMAKE_OPTS=\
   LEAN="${PREV_STAGE}/bin/lean${CMAKE_EXECUTABLE_SUFFIX}"\
 	OUT="${LIB}"\
 	LIB_OUT="${LIB}/lean"\
 	OLEAN_OUT="${LIB}/lean"\
-	LEAN_OPTS="${LEAN_EXTRA_MAKE_OPTS} -Dinterpreter.prefer_native=false"\
-	LEANC_OPTS="${LEANC_OPTS}"\
-	MORE_DEPS="${PREV_STAGE}/bin/lean${CMAKE_EXECUTABLE_SUFFIX}"\
+	LEAN_OPTS+="${LEAN_EXTRA_MAKE_OPTS} -Dinterpreter.prefer_native=false"\
+	LEANC_OPTS+="${LEANC_OPTS}"\
+	MORE_DEPS+="${PREV_STAGE}/bin/lean${CMAKE_EXECUTABLE_SUFFIX}"\
 	CMAKE_LIKE_OUTPUT=1
 
 stdlib:
diff --git a/tests/bench/speedcenter.exec.velcom.yaml b/tests/bench/speedcenter.exec.velcom.yaml
index 94debf3212..5345bd944f 100644
--- a/tests/bench/speedcenter.exec.velcom.yaml
+++ b/tests/bench/speedcenter.exec.velcom.yaml
@@ -11,7 +11,7 @@
   run_config:
     <<: *time
     cmd: |
-      bash -c 'bench=$PWD; cd ${BUILD:-../../build/release}/stage1; find lib/lean ! -name libleancpp.a -delete; LEANMAKE_OPTS=LEAN_OPTS="--stats\ -Dprofiler=true\ -Dprofiler.threshold=9999" make -O -j5 make_stdlib 2>&1 > /dev/null | $bench/accumulate_profile.py'
+      bash -c 'bench=$PWD; cd ${BUILD:-../../build/release}/stage1; find lib/lean ! -name libleancpp.a -delete; LEAN_OPTS="--stats -Dprofiler=true -Dprofiler.threshold=9999" make -O -j5 make_stdlib 2>&1 > /dev/null | $bench/accumulate_profile.py'
     max_runs: 2
     parse_output: true
   # Warmup. Somehow ccache doesn't reuse the cache from the original build? Weird.