diff --git a/dockerbuild.sh b/dockerbuild.sh
new file mode 100755
index 0000000..3264487
--- /dev/null
+++ b/dockerbuild.sh
@@ -0,0 +1,25 @@
+#!/bin/sh
+#
+# Build a ppt wheel in a docker container.
+#
+if [ -n "$UID" ]
+then
+  CHOWN=""
+else
+  CHOWN="" #chown -R $UID dist build src/ppbt/_toolchain"
+fi
+
+export CHOWN
+
+CMD="
+apt-get update;
+apt-get install -y gcc python3 \
+   python3-pip python3-venv build-essential patchelf
+cd /src
+python3 -m venv venv
+venv/bin/pip install build wheel setuptools
+venv/bin/python3 -m build
+$CHOWN
+"
+
+docker run --rm -v $(pwd):/src debian:11 /bin/sh -c "$CMD"
diff --git a/src/relenv_gdb/build.py b/src/relenv_gdb/build.py
index 1ec06c5..f2cf6c0 100644
--- a/src/relenv_gdb/build.py
+++ b/src/relenv_gdb/build.py
@@ -51,6 +51,7 @@ def build_gdb(prefix):
     relenv.common.extract_archive(str(src), archive_name)
     dir_name = archive_name.split(".tar")[0]
     os.environ.update(relenv.buildenv.buildenv(prefix))
+    os.environ["RELENV_PATH"] = str(prefix)
     os.environ[
         "CFLAGS"
     ] = f"{os.environ['CFLAGS']} -I{os.environ['RELENV_PATH']}/include/ncursesw"
@@ -67,8 +68,8 @@ def build_gdb(prefix):
                 f"--prefix={os.environ['RELENV_PATH']}/lib/python3.10/site-packages/relenv_gdb/gdb",
             ]
         )
-        subprocess.run(["make"])
-        subprocess.run(["make", "install"])
+        subprocess.run(["make"], check=True)
+        subprocess.run(["make", "install"], check=True)
 
     url = "https://ftp.gnu.org/gnu/gdb/gdb-13.2.tar.xz"
     relenv.common.download_url(