diff --git a/Makefile b/Makefile
index 552cb04..6595d81 100644
--- a/Makefile
+++ b/Makefile
@@ -85,7 +85,7 @@ distinct_id: checkht
 
 comparison: checkht
 	git submodule update --init --recursive
-	cd library/simdjson && make clean && cd ../..
+	git -C library/simdjson clean -xdf .
 	docker build  -f experiments/comparison/Dockerfile -t comparison .
 	$(eval outputdir:=$(PWD)/results/$(nodename)/comparison)
 	@echo $(outputdir)
diff --git a/experiments/comparison/Dockerfile b/experiments/comparison/Dockerfile
index 836f302..ce622e2 100644
--- a/experiments/comparison/Dockerfile
+++ b/experiments/comparison/Dockerfile
@@ -1,5 +1,6 @@
 FROM gcc:9.1
 COPY . /usr/src/
 WORKDIR /usr/src/experiments/comparison
+RUN apt update && apt install cmake -y
 RUN ./build.sh
 CMD ["bash", "run.sh"]
diff --git a/experiments/comparison/build.sh b/experiments/comparison/build.sh
index 33fe28e..d962ff7 100755
--- a/experiments/comparison/build.sh
+++ b/experiments/comparison/build.sh
@@ -1,4 +1,13 @@
 #!/bin/bash
+set -eux
 SCRIPTPATH="$( cd "$(dirname "$0")" ; pwd -P )"
 cd $SCRIPTPATH/../../library/simdjson
-make -k parsingcompetition  allparsingcompetition 
+mkdir build-benchmark
+cd build-benchmark
+cmake .. -DCMAKE_BUILD_TYPE=Release
+# older cmake (3.13) needs one target at a time
+cmake --build . -j $(nproc) --target parsingcompetition
+cmake --build . -j $(nproc) --target allparsingcompetition
+
+echo "$0: done building"
+
diff --git a/experiments/comparison/run.sh b/experiments/comparison/run.sh
index 8819468..ad62c5f 100755
--- a/experiments/comparison/run.sh
+++ b/experiments/comparison/run.sh
@@ -5,9 +5,9 @@ cd $SCRIPTPATH/../../library/simdjson
 for i in jsonexamples/*.json; do
     [ -f "$i" ] || break
     shortname=$(basename $i .json).table
-    ./parsingcompetition -t $i > $RESULTSPATH/$shortname
-    ./parsingcompetition  $i > $RESULTSPATH/detailed$shortname
-    ./allparsingcompetition -t $i > $RESULTSPATH/all$shortname
+    build-benchmark/benchmark/parsingcompetition -t $i > $RESULTSPATH/$shortname
+    build-benchmark/benchmark/parsingcompetition  $i > $RESULTSPATH/detailed$shortname
+    build-benchmark/benchmark/allparsingcompetition -t $i > $RESULTSPATH/all$shortname
     echo -n "."
 done
 echo
diff --git a/library/simdjson b/library/simdjson
index ab0e22a..a540e6a 160000
--- a/library/simdjson
+++ b/library/simdjson
@@ -1 +1 @@
-Subproject commit ab0e22a3169a038333a3ca9ae922571dbb18f5b1
+Subproject commit a540e6afc5fafde2ebac445d5d2b861268d467b9