diff --git a/Tests/oss-fuzz/build.sh b/Tests/oss-fuzz/build.sh
index 37fad7bc868..3aa6c7f6a24 100755
--- a/Tests/oss-fuzz/build.sh
+++ b/Tests/oss-fuzz/build.sh
@@ -15,7 +15,7 @@
 #
 ################################################################################
 
-python3 setup.py build --build-base=/tmp/build install
+python3 -m pip install .
 
 # Build fuzzers in $OUT.
 for fuzzer in $(find $SRC -name 'fuzz_*.py'); do