bazelruleclassprovider-0.14.patch

--- a/src/main/java/com/google/devtools/build/lib/bazel/rules/BazelRuleClassProvider.java
+++ b/src/main/java/com/google/devtools/build/lib/bazel/rules/BazelRuleClassProvider.java
@@ -168,6 +168,13 @@ public class BazelRuleClassProvider {
       env.put("PATH", null);
     }
 
+    Map<String, String> spackEnv = System.getenv();
+    for (String envName : spackEnv.keySet()) {
+      if (envName.startsWith("SPACK_")) {
+        env.put(envName, spackEnv.get(envName));
+      }
+    }
+
     // Shell environment variables specified via options take precedence over the
     // ones inherited from the fragments. In the long run, these fragments will
     // be replaced by appropriate default rc files anyway.