diff --git a/build_env/Dockerfile b/build_env/Dockerfile
index 523965ff..200a6e20 100644
--- a/build_env/Dockerfile
+++ b/build_env/Dockerfile
@@ -73,5 +73,5 @@ RUN apk add --no-cache pcre-dev pcre2-dev zlib-dev openssl-dev perl
 
 # Install Rust toolchain
 RUN apk add --no-cache curl
-RUN curl –proto ‘=https’ –tlsv1.2 -sSf https://sh.rustup.rs | sh -s -- -yq \
+RUN curl --proto '=https' –tlsv1.2 -sSf https://sh.rustup.rs | sh -s -- -yq \
   && ln -s ~/.cargo/bin/cargo /usr/bin/cargo
diff --git a/build_env/glibc_compat.c b/build_env/glibc_compat.c
index 378caf00..5e684662 100644
--- a/build_env/glibc_compat.c
+++ b/build_env/glibc_compat.c
@@ -220,4 +220,15 @@ ssize_t getrandom(void *buf, size_t buflen, unsigned int flags) {
     return (ssize_t)bytes_read;
 }
 
+#ifdef __x86_64__
+#define MEMFD_CREATE_SYSCALL 319
+#elif __aarch64__
+#define MEMFD_CREATE_SYSCALL 279
+#endif
+
+// introduced in glibc 2.27
+int memfd_create(const char *name, unsigned flags) {
+  return syscall(MEMFD_CREATE_SYSCALL, name, flags);
+}
+
 #endif
diff --git a/dd-trace-cpp b/dd-trace-cpp
index 85370e70..83958bcd 160000
--- a/dd-trace-cpp
+++ b/dd-trace-cpp
@@ -1 +1 @@
-Subproject commit 85370e70703ac54990d2f903c128bbcb43d71f6f
+Subproject commit 83958bcd5f0519fddd1bbdadadf8c94f290ac388