diff --git a/projects/llvm_libcxx/Dockerfile b/projects/llvm_libcxx/Dockerfile
index 389b3653c..81fd8b289 100644
--- a/projects/llvm_libcxx/Dockerfile
+++ b/projects/llvm_libcxx/Dockerfile
@@ -15,4 +15,5 @@
 ################################################################################
 FROM gcr.io/oss-fuzz-base/base-builder
 RUN git clone --depth 1 https://github.com/llvm/llvm-project.git
+WORKDIR llvm-project
 COPY build.sh $SRC/
diff --git a/projects/llvm_libcxx/build.sh b/projects/llvm_libcxx/build.sh
index 56130d3fb..b7f61c758 100755
--- a/projects/llvm_libcxx/build.sh
+++ b/projects/llvm_libcxx/build.sh
@@ -15,22 +15,5 @@
 #
 ################################################################################
 
-cd llvm-project
-
-if [[ $SANITIZER = *undefined* ]]; then
-  CXXFLAGS="$CXXFLAGS -fsanitize=unsigned-integer-overflow -fsanitize-trap=unsigned-integer-overflow"
-fi
-
-for f in $(grep -v "#" libcxx/fuzzing/RoutineNames.txt); do
-  cat > ${f}_fuzzer.cc <<EOF
-#include "fuzzing/fuzzing.h"
-#include <cassert>
-extern "C" int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
-  int result = fuzzing::$f(data, size);
-  assert(result == 0); return 0;
-}
-EOF
-  $CXX $CXXFLAGS -std=c++11 ${f}_fuzzer.cc ./libcxx/fuzzing/fuzzing.cpp \
-      -nostdinc++ -cxx-isystem ./libcxx/include -iquote ./libcxx \
-      -o $OUT/$f $LIB_FUZZING_ENGINE
-done
+# Run the oss-fuzz script in the repository
+./libcxx/utils/ci/oss-fuzz.sh