only set root build_dir for local builds

.rootlogon.C

@@ -7,8 +7,13 @@
 
   // setup a local build directory so we don't polute our source code with
   // ROOT dictionaries etc.
-  gSystem->Exec("mkdir -p /tmp/root_build");
-  gSystem->SetBuildDir("/tmp/root_build");
+  // note: don't do this for CI as this always fails the first time
+  //       we try to compile with a build_dir (as somehow the build_dir gets created only
+  //       after the compile files...)
+  const char* is_ci = gSystem->Getenv("CI");
+  if (!is_ci) {
+    gSystem->SetBuildDir("/tmp/root_build");
+  }
 
   // style definition based off the ATLAS style
   TStyle* s = gStyle;

benchmarks/dvmp/config.yml

@@ -35,6 +35,10 @@ dvmp:process:
   artifacts:
     paths:
       - results
+  retry:
+    max: 2
+    when:
+      - runner_system_failure
 
 dvmp:results:
   stage: collect