diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 6a10b51..3c61c03 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -12,7 +12,7 @@ jobs:
       - name: "Prune docker"
         run: docker system prune -f --all
       - name: "Get the code"
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           submodules: recursive
       - name: "Get tag version"
@@ -20,18 +20,18 @@ jobs:
       - name: "Print tag version"
         run: echo ${{ env.TAG_VERSION }}
       - name: "Set up QEMU"
-        uses: docker/setup-qemu-action@v2
+        uses: docker/setup-qemu-action@v3
       - name: "Set up Docker Buildx"
-        uses: docker/setup-buildx-action@v2
+        uses: docker/setup-buildx-action@v3
       - name: "Log in to DockerHub"
-        uses: docker/login-action@v2
+        uses: docker/login-action@v3
         with:
           registry: faasm.azurecr.io
           username: ${{ secrets.ACR_SERVICE_PRINCIPAL_ID }}
           password: ${{ secrets.ACR_SERVICE_PRINCIPAL_PASSWORD }}
       - name: "Build and push cpp-sysroot container"
         id: docker_build
-        uses: docker/build-push-action@v3
+        uses: docker/build-push-action@v4
         with:
           push: true
           file: docker/cpp-sysroot.dockerfile
diff --git a/docker/cpp-sysroot.dockerfile b/docker/cpp-sysroot.dockerfile
index 6ec26f1..9f6a73b 100644
--- a/docker/cpp-sysroot.dockerfile
+++ b/docker/cpp-sysroot.dockerfile
@@ -56,7 +56,7 @@ RUN cd /code/cpp \
         libfaasm \
         libfaasm --threads \
         libfaasmp \
-        libfaasmpi
+        libfaasmpi \
     # Lastly, build the libraries that populate the sysroot
     && inv \
         libffi \
diff --git a/faasmtools/build.py b/faasmtools/build.py
index 37db8a1..7857f07 100644
--- a/faasmtools/build.py
+++ b/faasmtools/build.py
@@ -372,14 +372,14 @@ def build_config_cmd(env_vars, cmd, shared=False, cxx=False, conf_args=True):
     return base_config_cmd
 
 
-def run_autotools(proj_dir):
+def run_autotools(env_vars, proj_dir):
     """
     Runs through autotools set-up on the given directory
     """
 
     def _run_auto_cmd(cmd):
         print("Running {}".format(cmd))
-        auto_cmd = build_config_cmd([cmd], conf_args=False)
+        auto_cmd = build_config_cmd(env_vars, [cmd], conf_args=False)
         auto_cmd = " ".join(auto_cmd)
         run(auto_cmd, shell=True, check=True, cwd=proj_dir)
 
diff --git a/tasks/libffi.py b/tasks/libffi.py
index 211455f..105df82 100644
--- a/tasks/libffi.py
+++ b/tasks/libffi.py
@@ -19,12 +19,14 @@ def build(ctx, clean=False, threads=False):
     if exists(join(LIBFFI_DIR, "Makefile")) and clean:
         run("make clean", cwd=LIBFFI_DIR, shell=True, check=True)
 
+    build_env = get_faasm_build_env_dict(threads)
+
     # Autotools
-    run_autotools(LIBFFI_DIR)
+    run_autotools(build_env, LIBFFI_DIR)
 
     # Configure
-    build_env = get_faasm_build_env_dict(threads)
     configure_cmd = build_config_cmd(
+        build_env,
         [
             "./configure",
             "--includedir={}".format(
diff --git a/tasks/zlib.py b/tasks/zlib.py
index 5783b7d..98e87d2 100644
--- a/tasks/zlib.py
+++ b/tasks/zlib.py
@@ -22,7 +22,7 @@ def zlib(ctx, clean=False, threads=False):
         "CXX={}".format(build_env["FAASM_WASM_CXX"]),
         "CFLAGS='{}'".format(build_env["FAASM_WASM_CFLAGS"]),
         "CXXFLAGS='{}'".format(build_env["FAASM_WASM_CXXFLAGS"]),
-        "LD={}".format(build_env["FAASM_WASM_LD"]),
+        "LD={}".format(build_env["FAASM_WASM_CC"]),
         "LDFLAGS='{}'".format(build_env["FAASM_WASM_STATIC_LINKER_FLAGS"]),
         "AR={}".format(build_env["FAASM_WASM_AR"]),
         "RANLIB={}".format(build_env["FAASM_WASM_RANLIB"]),