diff --git a/messages/uniworx/categories/health/de-de-formal.msg b/messages/uniworx/categories/health/de-de-formal.msg
index b510d0b47..171ed30c3 100644
--- a/messages/uniworx/categories/health/de-de-formal.msg
+++ b/messages/uniworx/categories/health/de-de-formal.msg
@@ -1,7 +1,7 @@
 HealthReport: Instanz-Zustand
 HealthMatchingClusterConfig: Cluster-geteilte Konfiguration ist aktuell
 HealthHTTPReachable: Cluster kann an der erwarteten URL über HTTP erreicht werden
-HealthLDAPAdmins: Anteil der Administrator:innen, die im LDAP-Verzeichnis gefunden werden können
+HealthLDAPAdmins: Anteil der Administrator:innen mit LDAP Authentifizierung, welche tatsächlich im LDAP-Verzeichnis gefunden werden können
 HealthSMTPConnect: SMTP-Server kann erreicht werden
 HealthWidgetMemcached: Memcached-Server liefert Widgets korrekt aus
 HealthActiveJobExecutors: Anteil der job-workers, die neue Befehle annehmen
diff --git a/messages/uniworx/categories/health/en-eu.msg b/messages/uniworx/categories/health/en-eu.msg
index 22e5fdd64..10a93ce88 100644
--- a/messages/uniworx/categories/health/en-eu.msg
+++ b/messages/uniworx/categories/health/en-eu.msg
@@ -1,7 +1,7 @@
 HealthReport: Health report
 HealthMatchingClusterConfig: Cluster config matches
 HealthHTTPReachable: Cluster can be reached under the expected URL via HTTP
-HealthLDAPAdmins: Proportion of administrators that were found in the LDAP directory
+HealthLDAPAdmins: Proportion of administrators with LDAP authentication that were acutally found in the LDAP directory
 HealthSMTPConnect: SMTP server is reachable
 HealthWidgetMemcached: Memcached server is serving widgets correctly
 HealthActiveJobExecutors: Proportion of job workers accepting new jobs
diff --git a/nix/docker/default.nix b/nix/docker/default.nix
index da4a81d90..cc8897469 100644
--- a/nix/docker/default.nix
+++ b/nix/docker/default.nix
@@ -20,17 +20,19 @@ let
 
     contents = with final; [
       uniworx.uniworx.components.exes.uniworx
-      prev.dockerTools.binSh findutils coreutils
-      cups # needed for interface with print center 
-      #texlive.combined.scheme-medium # Causes container to be too large! However, might be needed by the pandoc library to produce PDFs, but nix ought to include the necessary parts already
-      #texlive.combined.scheme-basic # for PDFLaTeX for pandoc PDF creation
-      (texlive.combine {
-          inherit (texlive) scheme-basic xcolor unicode-math;
-        })
-      # pandoc  # just for manual testing within the pod, remove for production, since we use the library instead!
-      curl wget netcat # just for manual testing within the pod, remove for production!
-      openldap  # just for manual testing within the pod, remove for production!
+      prev.dockerTools.binSh findutils coreutils      
       iana-etc
+      # for PDFLaTeX for pandoc PDF creation
+      cups # needed for interface with print center 
+      #texlive.combined.scheme-medium # too large for container in LMU build environment.
+      (texlive.combine {        
+          inherit (texlive) scheme-basic xcolor 
+            # lualatex
+            luatexbase unicode-math lualatex-math selnolig
+            ;
+        })      
+      # just for manual testing within the pod, may be removef for production?
+      curl wget netcat openldap 
       unixtools.netstat htop gnugrep
     ] ++ optionals isDemo [ postgresql_12 memcached uniworx.uniworx.components.exes.uniworxdb ];
 
@@ -48,6 +50,9 @@ let
       mkdir -p /var/log
       install -d -g uniworx -o uniworx -m 0755 /var/log/uniworx
 
+      # just to see how to create directories here
+      mkdir -p /testdir 
+
       ${optionalString isDemo ''
           install -d -g uniworx -o uniworx -m 0750 /var/lib/postgres
 
diff --git a/shell.nix b/shell.nix
index 119972679..f34fe2909 100644
--- a/shell.nix
+++ b/shell.nix
@@ -74,9 +74,13 @@ in pkgs.mkShell {
   ++ (with pkgs; 
       [ nodejs-14_x postgresql_12 openldap google-chrome exiftool memcached minio minio-client 
         gup skopeo 
+        # texlive.combined.scheme-medium
         # texlive.combined.scheme-small 
         (texlive.combine {
-          inherit (texlive) scheme-basic xcolor unicode-math;
+          inherit (texlive) scheme-basic xcolor 
+            # lualatex
+            luatexbase unicode-math lualatex-math selnolig
+            ;
         })
       ]
      )
diff --git a/src/Handler/Admin/Test.hs b/src/Handler/Admin/Test.hs
index 014700130..4c9695be0 100644
--- a/src/Handler/Admin/Test.hs
+++ b/src/Handler/Admin/Test.hs
@@ -289,7 +289,7 @@ getAdminTestPdfR = do
     P.makePDF "lualatex" texopts P.writeLaTeX writeropts doc    -- unicode-math.sty not found    
   case content of 
     Right (Right bs) -> do 
-      liftIO $ L.writeFile "generated.pdf" bs            
+      liftIO $ L.writeFile "/tmp/generated.pdf" bs            
       now <- liftIO getCurrentTime
       sendByteStringAsFile "demoPDF.pdf" (L.toStrict bs) now 
       -- sendResponse (typePDF, toContent bs)