diff --git a/.github/workflows/e2e.yaml b/.github/workflows/e2e.yaml
index f2a96f5dce5..2fde4088392 100644
--- a/.github/workflows/e2e.yaml
+++ b/.github/workflows/e2e.yaml
@@ -14,10 +14,6 @@ on:
       - "**.md"
       - "LICENSE"
 
-env:
-  REGISTRY: ghcr.io
-  IMAGE_NAME: ibc-go-simd
-
 jobs:
     determine-image-tag:
       if: ${{ !github.event.pull_request.head.repo.fork && github.actor != 'dependabot[bot]' }}
@@ -31,9 +27,14 @@ jobs:
             go-version: 1.18
         - id: get-tag
           run: |
-            tag=$(go run cmd/determine_simd_tag/main.go -pr "${{ github.event.pull_request.number }}" )
-            echo "Using tag $tag"
-            echo "simd-tag=$tag" >> $GITHUB_OUTPUT
+            if [ -z "${{ github.event.pull_request.number }}" ]
+            then
+              echo "simd-tag=main" >> $GITHUB_OUTPUT
+            else
+              tag="pr-${{ github.event.pull_request.number }}"
+              echo "Using tag $tag"
+              echo "simd-tag=$tag" >> $GITHUB_OUTPUT
+            fi
     e2e:
       if: ${{ !github.event.pull_request.head.repo.fork && github.actor != 'dependabot[bot]' }}
       needs:
diff --git a/cmd/determine_simd_tag/main.go b/cmd/determine_simd_tag/main.go
deleted file mode 100644
index e7b5d718194..00000000000
--- a/cmd/determine_simd_tag/main.go
+++ /dev/null
@@ -1,26 +0,0 @@
-package main
-
-import (
-	"flag"
-	"fmt"
-)
-
-var prNum string
-
-func init() {
-	flag.StringVar(&prNum, "pr", "", "the number of the pr")
-	flag.Parse()
-}
-
-// in the context of a GithubAction workflow, the PR is non empty if it is a pr. When
-// code is merged to main, it will be empty. In this case we just use the "main" tag.
-func main() {
-	fmt.Print(getSimdTag(prNum))
-}
-
-func getSimdTag(prNum string) string {
-	if prNum == "" {
-		return "main"
-	}
-	return fmt.Sprintf("pr-%s", prNum)
-}