diff --git a/.github/workflows/package-pr.yaml b/.github/workflows/package-pr.yaml
index b3027ec..bb264a3 100644
--- a/.github/workflows/package-pr.yaml
+++ b/.github/workflows/package-pr.yaml
@@ -55,7 +55,9 @@ jobs:
         run: |
           PACKAGES=$(jq '.[]' -r ${HOME}/files.json | awk -F/ '{ print $2 "-" $3 }' | sort -u)
           echo "Packages: $PACKAGES"
-          docker run -v "${{ github.workspace }}:/piston" docker.pkg.github.com/engineer-man/piston/repo-builder:latest --no-server $PACKAGES
+          docker pull docker.pkg.github.com/engineer-man/piston/repo-builder:latest
+          docker build -t repo-builder repo
+          docker run -v "${{ github.workspace }}:/piston" repo-builder --no-server $PACKAGES
           ls -la packages
 
       - name: Upload package as artifact
@@ -89,7 +91,9 @@ jobs:
         run: |
           ls -la
           docker run -v $(pwd)'/repo:/piston/repo' -v $(pwd)'/packages:/piston/packages' -d --name repo docker.pkg.github.com/engineer-man/piston/repo-builder --no-build
-          docker run --network container:repo -v $(pwd)'/data:/piston' -e PISTON_LOG_LEVEL=DEBUG -e 'PISTON_REPO_URL=http://localhost:8000/index' -d --name api docker.pkg.github.com/engineer-man/piston/api
+          docker pull docker.pkg.github.com/engineer-man/piston/api
+          docker build -t piston-api api
+          docker run --network container:repo -v $(pwd)'/data:/piston' -e PISTON_LOG_LEVEL=DEBUG -e 'PISTON_REPO_URL=http://localhost:8000/index' -d --name api piston-api
           echo Waiting for API to start..
           docker run --network container:api appropriate/curl -s --retry 10 --retry-connrefused http://localhost:2000/api/v2/runtimes
 
diff --git a/.github/workflows/package-push.yaml b/.github/workflows/package-push.yaml
index ad33f3e..bbb44af 100644
--- a/.github/workflows/package-push.yaml
+++ b/.github/workflows/package-push.yaml
@@ -33,7 +33,9 @@ jobs:
         run: |
           PACKAGES=$(jq '.[]' -r ${HOME}/files.json | awk -F/ '{ print $2 "-" $3 }' | sort -u)
           echo "Packages: $PACKAGES"
-          docker run -v "${{ github.workspace }}:/piston" docker.pkg.github.com/engineer-man/piston/repo-builder:latest --no-server $PACKAGES
+          docker pull docker.pkg.github.com/engineer-man/piston/repo-builder:latest
+          docker build -t repo-builder repo
+          docker run -v "${{ github.workspace }}:/piston" repo-builder --no-server $PACKAGES
           ls -la packages
 
       - name: Upload Packages
@@ -73,4 +75,4 @@ jobs:
           file: index
           tag: pkgs
           overwrite: true
-          file_glob: true
\ No newline at end of file
+          file_glob: true
diff --git a/cli/package-lock.json b/cli/package-lock.json
index d564e5f..ad65043 100644
--- a/cli/package-lock.json
+++ b/cli/package-lock.json
@@ -9,7 +9,7 @@
             "version": "1.0.0",
             "license": "MIT",
             "dependencies": {
-                "axios": "^0.21.1",
+                "axios": "^0.21.2",
                 "chalk": "^4.1.0",
                 "minimatch": "^3.0.4",
                 "nocamel": "^1.0.2",
@@ -37,11 +37,11 @@
             }
         },
         "node_modules/axios": {
-            "version": "0.21.1",
-            "resolved": "https://registry.npmjs.org/axios/-/axios-0.21.1.tgz",
-            "integrity": "sha512-dKQiRHxGD9PPRIUNIWvZhPTPpl1rf/OxTYKsqKUDjBwYylTvV7SjSHJb9ratfyzM6wCdLCOYLzs73qpg5c4iGA==",
+            "version": "0.21.2",
+            "resolved": "https://registry.npmjs.org/axios/-/axios-0.21.2.tgz",
+            "integrity": "sha512-87otirqUw3e8CzHTMO+/9kh/FSgXt/eVDvipijwDtEuwbkySWZ9SBm6VEubmJ/kLKEoLQV/POhxXFb66bfekfg==",
             "dependencies": {
-                "follow-redirects": "^1.10.0"
+                "follow-redirects": "^1.14.0"
             }
         },
         "node_modules/balanced-match": {
@@ -115,11 +115,22 @@
             }
         },
         "node_modules/follow-redirects": {
-            "version": "1.13.3",
-            "resolved": "https://registry.npmjs.org/follow-redirects/-/follow-redirects-1.13.3.tgz",
-            "integrity": "sha512-DUgl6+HDzB0iEptNQEXLx/KhTmDb8tZUHSeLqpnjpknR70H0nC2t9N73BK6fN4hOvJ84pKlIQVQ4k5FFlBedKA==",
+            "version": "1.14.3",
+            "resolved": "https://registry.npmjs.org/follow-redirects/-/follow-redirects-1.14.3.tgz",
+            "integrity": "sha512-3MkHxknWMUtb23apkgz/83fDoe+y+qr0TdgacGIA7bew+QLBo3vdgEN2xEsuXNivpFy4CyDhBBZnNZOtalmenw==",
+            "funding": [
+                {
+                    "type": "individual",
+                    "url": "https://github.com/sponsors/RubenVerborgh"
+                }
+            ],
             "engines": {
                 "node": ">=4.0"
+            },
+            "peerDependenciesMeta": {
+                "debug": {
+                    "optional": true
+                }
             }
         },
         "node_modules/get-caller-file": {
@@ -297,11 +308,11 @@
             }
         },
         "axios": {
-            "version": "0.21.1",
-            "resolved": "https://registry.npmjs.org/axios/-/axios-0.21.1.tgz",
-            "integrity": "sha512-dKQiRHxGD9PPRIUNIWvZhPTPpl1rf/OxTYKsqKUDjBwYylTvV7SjSHJb9ratfyzM6wCdLCOYLzs73qpg5c4iGA==",
+            "version": "0.21.2",
+            "resolved": "https://registry.npmjs.org/axios/-/axios-0.21.2.tgz",
+            "integrity": "sha512-87otirqUw3e8CzHTMO+/9kh/FSgXt/eVDvipijwDtEuwbkySWZ9SBm6VEubmJ/kLKEoLQV/POhxXFb66bfekfg==",
             "requires": {
-                "follow-redirects": "^1.10.0"
+                "follow-redirects": "^1.14.0"
             }
         },
         "balanced-match": {
@@ -366,9 +377,9 @@
             "integrity": "sha512-k0er2gUkLf8O0zKJiAhmkTnJlTvINGv7ygDNPbeIsX/TJjGJZHuh9B2UxbsaEkmlEo9MfhrSzmhIlhRlI2GXnw=="
         },
         "follow-redirects": {
-            "version": "1.13.3",
-            "resolved": "https://registry.npmjs.org/follow-redirects/-/follow-redirects-1.13.3.tgz",
-            "integrity": "sha512-DUgl6+HDzB0iEptNQEXLx/KhTmDb8tZUHSeLqpnjpknR70H0nC2t9N73BK6fN4hOvJ84pKlIQVQ4k5FFlBedKA=="
+            "version": "1.14.3",
+            "resolved": "https://registry.npmjs.org/follow-redirects/-/follow-redirects-1.14.3.tgz",
+            "integrity": "sha512-3MkHxknWMUtb23apkgz/83fDoe+y+qr0TdgacGIA7bew+QLBo3vdgEN2xEsuXNivpFy4CyDhBBZnNZOtalmenw=="
         },
         "get-caller-file": {
             "version": "2.0.5",
diff --git a/cli/package.json b/cli/package.json
index 6df989d..c244403 100644
--- a/cli/package.json
+++ b/cli/package.json
@@ -5,7 +5,7 @@
     "main": "index.js",
     "license": "MIT",
     "dependencies": {
-        "axios": "^0.21.1",
+        "axios": "^0.21.2",
         "chalk": "^4.1.0",
         "minimatch": "^3.0.4",
         "nocamel": "^1.0.2",
diff --git a/packages/mono/6.12.0/compile b/packages/mono/6.12.0/compile
index 5246bc2..e3ae230 100644
--- a/packages/mono/6.12.0/compile
+++ b/packages/mono/6.12.0/compile
@@ -1,13 +1,20 @@
 #!/bin/bash
 
+check_errors () {
+    grep -q 'error [A-Z]\+[0-9]\+:' check.txt && cat check.txt 1>&2 || cat check.txt
+    rm check.txt
+}
+
 case "${PISTON_LANGUAGE}" in
     csharp)
         rename 's/$/\.cs/' "$@" # Add .cs extension
-        csc -out:out *.cs
+        csc -out:out *.cs > check.txt
+        check_errors
         ;;
     basic)
         rename 's/$/\.vb/' "$@" # Add .vb extension
-        vbnc -out:out *.vb
+        vbnc -out:out *.vb > check.txt
+        check_errors
         ;;
     *)
         echo "How did you get here? (${PISTON_LANGUAGE})"