diff --git a/vars/buildStage.groovy b/vars/buildStage.groovy
index 362a7ea..f6a4991 100644
--- a/vars/buildStage.groovy
+++ b/vars/buildStage.groovy
@@ -13,12 +13,15 @@ void call(Map config = [:], Closure body = { }) {
         if (runConfig.saveArtifacts) {
             assert runConfig.artifacts : 'Error: saveArtifacts is set to true; must specify artifacts!'
         }
-        if ( fileExists(runConfig.buildRequires)) {
-            sh """
-                ${runConfig.buildCmd}
-            """
-        } else {
-            error("ERROR: File ${runConfig.buildRequires} does not exist in workspace.")
+        withEnv(["TAG=${runConfig.gitTag}", "HASH=${runConfig.gitHash}", "VERSION=${version}"]) {
+            if ( fileExists(runConfig.buildRequires)) {
+                sh """
+                    ${runConfig.buildCmd}
+                """
+            } else {
+                error("ERROR: File ${runConfig.buildRequires} does not exist in workspace.")
+            }
+            body()
         }
         if (runConfig.saveArtifacts) {
             artifactsList = runConfig.artifacts.join(',')