diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index ee03230..c0017ae 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -37,7 +37,7 @@ jobs:
             type=ref,event=pr,prefix=pr-,suffix=suffix=-${{ matrix.variant }}
             type=pep440,pattern={{version}},suffix=-${{ matrix.variant }}
             type=raw,${{ matrix.variant }}
-            type=sha,prefix=,suffix=-${{ matrix.variant }}
+            type=sha,prefix=,suffix=_${{ matrix.variant }}
       - name: Setup QEMU
         uses: docker/setup-qemu-action@v2
       - name: Setup Docker BuildX
diff --git a/Dockerfile b/Dockerfile
index 040e403..ec6d5a0 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -14,11 +14,15 @@ RUN go mod download
 COPY .. .
 
 RUN --mount=type=cache,target=/go/pkg/mod for variant in tier1 tier2 tier3; do GOOS=${TARGETOS} GOARCH=${TARGETARCH} make release OUT="./out/igloo.${variant}" VARIANT=${variant}; done
+RUN --mount=type=cache,target=/go/pkg/mod GOOS=${TARGETOS} GOARCH=${TARGETARCH} go build -o ./out/gen_runtimes ./cmd/gen_runtimes
 
 FROM --platform=${BUILDPLATFORM} alphanecron/judge-env:tier-1 AS tier-1
 WORKDIR /igloo
 
 COPY --from=builder /usr/src/app/out/igloo.tier1 ./igloo
+COPY --from=builder /usr/src/app/out/gen_runtimes ./gen_runtimes
+
+RUN ./gen_runtimes
 
 ENTRYPOINT ["/igloo/igloo"]
 
@@ -26,6 +30,9 @@ FROM --platform=${BUILDPLATFORM} alphanecron/judge-env:tier-2 AS tier-2
 WORKDIR /igloo
 
 COPY --from=builder /usr/src/app/out/igloo.tier2 ./igloo
+COPY --from=builder /usr/src/app/out/gen_runtimes ./gen_runtimes
+
+RUN ./gen_runtimes
 
 ENTRYPOINT ["/igloo/igloo"]
 
diff --git a/worker/worker.go b/worker/worker.go
index 23b668a..0af7aab 100644
--- a/worker/worker.go
+++ b/worker/worker.go
@@ -14,7 +14,6 @@ import (
 	"math"
 	"runtime"
 	"slices"
-	"strings"
 	"sync/atomic"
 )
 
@@ -141,8 +140,6 @@ func (w *JudgeWorker) Judge(r *_runner, sub types.Submission) {
 	})
 	finalResult := judge()
 	if finalResult != nil {
-		// replace actual new line characters with \\n to avoid shattered payloads when serializing response with msgpack
-		finalResult.CompilerOutput = strings.ReplaceAll(finalResult.CompilerOutput, "\n", "\\n")
 		logger.Logger.Debug().Interface("result", finalResult).Interface("submission", sub).Msg("final result")
 	}
 	prod.Report(types.ResultFinal, finalResult)