diff --git a/container-build/cerc-builder-js/README.md b/container-build/cerc-builder-js/README.md
index ea09f21e..c1a93e32 100644
--- a/container-build/cerc-builder-js/README.md
+++ b/container-build/cerc-builder-js/README.md
@@ -12,5 +12,14 @@ it is possible to build packages manually by invoking `docker run` , for example
 $ docker run -it --add-host host.docker.internal:host-gateway \
   -v ${HOME}/cerc/laconic-sdk:/workspace cerc/builder-js \
   sh -c 'cd /workspace && NPM_AUTH_TOKEN=6613572a28ebebaee20ccd90064251fa8c2b94f6 \
-  /build-npm-package.sh http://host.docker.internal:3000/api/packages/cerc-io/npm/ 1.2.3-test'
+  /build-npm-package.sh http://host.docker.internal:3000/api/packages/cerc-io/npm/ 0.1.4'
+```
+
+or:
+
+```
+$ docker run --rm -it --add-host host.docker.internal:host-gateway \
+  -v ${HOME}/cerc/laconic-registry-cli:/workspace cerc/builder-js  \
+  sh -c 'cd /workspace && NPM_AUTH_TOKEN=6613572a28ebebaee20ccd90064251fa8c2b94f6 \
+  /build-npm-package.sh http://host.docker.internal:3000/api/packages/cerc-io/npm/ 0.1.4'
 ```
diff --git a/container-build/cerc-builder-js/build-npm-package.sh b/container-build/cerc-builder-js/build-npm-package.sh
index cc2eeb26..9e5094b2 100755
--- a/container-build/cerc-builder-js/build-npm-package.sh
+++ b/container-build/cerc-builder-js/build-npm-package.sh
@@ -1,7 +1,7 @@
 #!/bin/bash
 # Usage: build-npm-package.sh <registry-url> <publish-with-this-version>
 # Note: supply the registry auth token in NPM_AUTH_TOKEN
-if [ -n "$CERC_ENABLE_SCRIPT_DEBUG" ]; then
+if [ -n "$CERC_SCRIPT_DEBUG" ]; then
     set -x
 fi
 if [[ $# -ne 2 ]]; then
diff --git a/container-build/cerc-builder-js/yarn-local-registry-fixup.sh b/container-build/cerc-builder-js/yarn-local-registry-fixup.sh
new file mode 100755
index 00000000..b16585cf
--- /dev/null
+++ b/container-build/cerc-builder-js/yarn-local-registry-fixup.sh
@@ -0,0 +1,27 @@
+#!/bin/bash
+# Usage: yarn-local-registry-fixup.sh <package-to-fix>
+# Assumes package.json and yarn.lock are in the cwd
+if [ -n "$CERC_SCRIPT_DEBUG" ]; then
+    set -x
+fi
+if [[ $# -ne 1 ]]; then
+    echo "Illegal number of parameters" >&2
+    exit 1
+fi
+target_package=$1
+versioned_target_package=$(grep ${target_package} package.json | sed -e 's#[[:space:]]\{1,\}\"\('${target_package}'\)\":[[:space:]]\{1,\}\"\(.*\)\",#\1@\2#' )
+yarn_info_output=$(yarn info --json $versioned_target_package 2>/dev/null)
+package_tarball=$(echo $yarn_info_output | jq -r .data.dist.tarball)
+package_integrity=$(echo $yarn_info_output | jq -r .data.dist.integrity)
+package_shasum=$(echo $yarn_info_output | jq -r .data.dist.shasum)
+package_resolved=${package_tarball}#${package_shasum}
+escaped_package_resolved=$(printf '%s\n' "$package_resolved" | sed -e 's/[\/&]/\\&/g')
+escaped_target_package=$(printf '%s\n' "$target_package" | sed -e 's/[\/&]/\\&/g')
+if [ -n "$CERC_SCRIPT_VERBOSE" ]; then
+    echo "Tarball: ${package_tarball}"
+    echo "Integrity: ${package_integrity}"
+    echo "Shasum: ${package_shasum}"
+    echo "Resolved: ${package_resolved}"
+fi
+sed -i -e '/^\"'${escaped_target_package}'.*\":$/ , /^\".*$/ s/^\([[:space:]]\{1,\}resolved \).*$/\1'\"${escaped_package_resolved}\"'/' yarn.lock
+sed -i -e '/^\"'${escaped_target_package}'.*\":$/ , /^\".*$/ s/^\([[:space:]]\{1,\}integrity \).*$/\1'${package_integrity}'/' yarn.lock