diff --git a/lambdatex.cabal b/lambdatex.cabal
--- a/lambdatex.cabal
+++ b/lambdatex.cabal
@@ -1,5 +1,5 @@
 name:                lambdatex
-version:             0.1.0.1
+version:             0.1.0.2
 synopsis:            Type-Safe LaTeX EDSL
 description:         
   ΛTeX, pronounced 'LambdaTeX' is a Haskell EDSL that adds type-safety to LaTeX.
@@ -20,6 +20,7 @@
 library
   hs-source-dirs:      src
   exposed-modules:     Text.LaTeX.LambdaTeX
+                       Text.LaTeX.LambdaTeX.Action
                        Text.LaTeX.LambdaTeX.Error
                        Text.LaTeX.LambdaTeX.Package
                        Text.LaTeX.LambdaTeX.Package.Internal
@@ -40,6 +41,7 @@
                      , containers       >= 0.5      && < 0.6
                      , transformers     >= 0.4      && < 0.5
                      , directory        >= 1.2      && < 1.3
+                     , async            >= 2.0      && < 2.1
   ghc-options:        -Wall
                       -fwarn-unused-imports
                       -fwarn-incomplete-patterns
diff --git a/src/Text/LaTeX/LambdaTeX.hs b/src/Text/LaTeX/LambdaTeX.hs
--- a/src/Text/LaTeX/LambdaTeX.hs
+++ b/src/Text/LaTeX/LambdaTeX.hs
@@ -15,19 +15,25 @@
     -- ** Packages dependencies
     , module Text.LaTeX.LambdaTeX.Package
 
+    -- ** IO dependencies
+    , module Text.LaTeX.LambdaTeX.Action
+
     -- ** Re-exports
     , module Text.LaTeX.LambdaTeX.Types
 
     ) where
 
+import           Control.Monad                           (forM_)
 import           Control.Monad.IO.Class                  (MonadIO (..))
 
+import           Control.Concurrent.Async                (async, wait)
+
 import qualified Data.Set                                as S
-import qualified Data.Text                               as T
 import qualified Data.Text.IO                            as T
 
 import           Text.LaTeX.Base                         (LaTeX, renderFile)
 
+import           Text.LaTeX.LambdaTeX.Action
 import           Text.LaTeX.LambdaTeX.Package
 import           Text.LaTeX.LambdaTeX.Package.Internal
 import           Text.LaTeX.LambdaTeX.Reference
@@ -46,20 +52,31 @@
 --      * LaTeX file generation
 --      * Automatic bibtex file generation
 --      * All safety provided by 'execLambdaTeXT' (in the form of textual errors)
---      * TODO(kerckhove) Automatic asynchronic resolution of figure dependencies on graphviz or tikz figures
+--      * Automatic asynchronic resolution of IO dependencies for graphviz or tikz figures
 buildLaTeXProject :: MonadIO m => ΛTeXT m a -> ProjectConfig -> m (Either [ΛError] ())
 buildLaTeXProject func conf = do
-    (errs, (latex, refs)) <- execLambdaTeXT func $ projectGenerationConfig conf
+    (errs, latex, refs, actions) <- execLambdaTeXT func $ projectGenerationConfig conf
 
+
     -- Render tex file
-    let mainTexFile = projectTexFileName conf ++ ".tex"
-    liftIO $ renderFile mainTexFile latex
+    let renderTex = do
+            let mainTexFile = projectTexFileName conf ++ ".tex"
+            renderFile mainTexFile latex
 
     -- Render bib file
-    let mainBibFile = projectBibFileName conf ++ ".bib"
-    liftIO $ removeIfExists mainBibFile
-    liftIO $ T.appendFile mainBibFile $ renderReferences refs
+    let renderMain = do
+            let mainBibFile = projectBibFileName conf ++ ".bib"
+            removeIfExists mainBibFile
+            T.appendFile mainBibFile $ renderReferences refs
 
+    let performAction (name, action) = do
+            action
+            putStrLn $ "Job " ++ name ++ " done."
+
+    -- Perform all the IO actions asynchronously
+    as <- liftIO $ mapM async $ renderTex : renderMain : map performAction actions
+    liftIO $ forM_ as wait
+
     return $ if null errs
         then Right ()
         else Left errs
@@ -74,11 +91,12 @@
 --      * Internal dependency safety. No more '??' for external references in the internal pdf.
 --      * Package dependency resolution, TODO(kerckhove) with packages in the right order
 --      * Dependency selection of figure dependencies on graphviz or tikz figures
-execLambdaTeXT :: Monad m => ΛTeXT m a -> GenerationConfig -> m ([ΛError], (LaTeX, [Reference]))
+execLambdaTeXT :: Monad m => ΛTeXT m a -> GenerationConfig -> m ([ΛError], LaTeX, [Reference], [(String, IO ())])
 execLambdaTeXT func conf = do
     ((_,latex), _, output) <- runΛTeX func (ΛConfig $ generationSelection conf) initState
     let result = injectPackageDependencies (S.toList $ outputPackageDependencies output) latex
     let refs = S.toList $ outputExternalReferences output
+    let actions = outputActions output
 
     -- Check reference errors
     let made = outputLabelsMade output
@@ -87,7 +105,7 @@
 
     let referss = map ReferenceMissing $ S.toList diff
 
-    return (referss, (result, refs))
+    return (referss, result, refs, actions)
 
   where
     initState :: ΛState
diff --git a/src/Text/LaTeX/LambdaTeX/Action.hs b/src/Text/LaTeX/LambdaTeX/Action.hs
new file mode 100644
--- /dev/null
+++ b/src/Text/LaTeX/LambdaTeX/Action.hs
@@ -0,0 +1,12 @@
+{-# LANGUAGE OverloadedStrings #-}
+module Text.LaTeX.LambdaTeX.Action where
+
+import           Text.LaTeX.LambdaTeX.Types
+
+-- | Register an IO action (with a given name) that needs to be completed before the pdf can be built.
+--
+-- Use this to generate and build external resources that are included with @includegraphics@ for example.
+registerAction :: Monad m => String -- ^ Name of the job
+                          -> IO () -- ^ Job
+                          -> ΛTeXT m ()
+registerAction name func = λtell $ mempty { outputActions = [(name, func)] }
diff --git a/src/Text/LaTeX/LambdaTeX/Types.hs b/src/Text/LaTeX/LambdaTeX/Types.hs
--- a/src/Text/LaTeX/LambdaTeX/Types.hs
+++ b/src/Text/LaTeX/LambdaTeX/Types.hs
@@ -140,14 +140,16 @@
     , outputExternalReferences  :: Set Reference
     , outputLabelsMade          :: Set Text
     , outputLabelsNeeded        :: Set Text
+    , outputActions             :: [(String, IO ())]
     }
 
 instance Monoid ΛOutput where
     mempty = ΛOutput {
             outputPackageDependencies   = S.empty
           , outputExternalReferences    = S.empty
-          , outputLabelsMade = S.empty
-          , outputLabelsNeeded = S.empty
+          , outputLabelsMade            = S.empty
+          , outputLabelsNeeded          = S.empty
+          , outputActions               = []
         }
 
     mappend o1 o2 = ΛOutput {
@@ -167,6 +169,7 @@
                 S.union
                     (outputLabelsNeeded o1)
                     (outputLabelsNeeded o2)
+          , outputActions = outputActions o1 ++ outputActions o2
         }
 
 -- | Internal ΛTeXT configration state