diff --git a/core/build.gradle.kts b/core/build.gradle.kts
index f2225dbb8..0d1c16825 100644
--- a/core/build.gradle.kts
+++ b/core/build.gradle.kts
@@ -79,7 +79,8 @@ configure<BlossomExtension> {
     val indra = the<IndraGitExtension>()
 
     val mainFile = "src/main/java/org/geysermc/geyser/GeyserImpl.java"
-    val branchName = indra.branchName() ?: "DEV"
+    // On Jenkins, a detached head is checked out, so indra cannot determine the branch. Fortunately, this environment variable is available.
+    val branchName = indra.branchName() ?: System.getenv("GIT_BRANCH") ?: "DEV"
     val commit = indra.commit()
     val git = indra.git()
     val gitVersion = "git-${branchName}-${commit?.name?.substring(0, 7) ?: "0000000"}"
@@ -93,4 +94,4 @@ configure<BlossomExtension> {
 }
 
 fun Project.buildNumber(): Int =
-    Integer.parseInt(System.getenv("BUILD_NUMBER") ?: "-1")
\ No newline at end of file
+    Integer.parseInt(System.getenv("BUILD_NUMBER") ?: "-1")