diff --git a/releases/git.go b/releases/git.go
index d88c6d9..e19ec78 100644
--- a/releases/git.go
+++ b/releases/git.go
@@ -30,6 +30,9 @@ type GitMetadata struct {
 
 	// IsTaggedRelease indicates if the build is for a versioned tag
 	IsTaggedRelease bool
+
+	// Repository is the owner+name of the current repository
+	Repository string
 }
 
 func (m GitMetadata) ShouldPublishPermalink() bool {
@@ -41,8 +44,9 @@ func (m GitMetadata) ShouldPublishPermalink() bool {
 func LoadMetadata() GitMetadata {
 	loadMetadata.Do(func() {
 		gitMetadata = GitMetadata{
-			Version: getVersion(),
-			Commit:  getCommit(),
+			Version:    getVersion(),
+			Commit:     getCommit(),
+			Repository: getRepository(),
 		}
 
 		gitMetadata.Permalink, gitMetadata.IsTaggedRelease = getPermalink()
@@ -51,12 +55,16 @@ func LoadMetadata() GitMetadata {
 		log.Println("Permalink:", gitMetadata.Permalink)
 		log.Println("Version:", gitMetadata.Version)
 		log.Println("Commit:", gitMetadata.Commit)
+		log.Println("Repository:", gitMetadata.Repository)
 	})
 
-	// Save the metadata as environment variables to use later in the CI pipeline
-	p, _ := ci.DetectBuildProvider()
-	mgx.Must(p.SetEnv("PERMALINK", gitMetadata.Permalink))
-	mgx.Must(p.SetEnv("VERSION", gitMetadata.Version))
+	// Workaround to avoid writing to GITHUB_ENV when building the Homebrew formula.
+	if gitMetadata.Repository != "Homebrew/homebrew-core" {
+		// Save the metadata as environment variables to use later in the CI pipeline
+		p, _ := ci.DetectBuildProvider()
+		mgx.Must(p.SetEnv("PERMALINK", gitMetadata.Permalink))
+		mgx.Must(p.SetEnv("VERSION", gitMetadata.Version))
+	}
 
 	return gitMetadata
 }
@@ -162,3 +170,12 @@ func getPermalink() (string, bool) {
 		return fmt.Sprintf("%s-%s", permalinkPrefix, strings.TrimPrefix(branch, "release/")), taggedRelease
 	}
 }
+
+func getRepository() string {
+	repository, ok := os.LookupEnv("GITHUB_REPOSITORY")
+	if !ok {
+		repository = "getporter/porter"
+	}
+
+	return repository
+}