diff --git a/flake.nix b/flake.nix
index 0cc0c140..754a03b7 100644
--- a/flake.nix
+++ b/flake.nix
@@ -48,6 +48,10 @@
               cabal-install
               pythonDevEnv
               self.inputs.hls.packages.${system}."haskell-language-server-${compilerVersion}"
+              pkgs.cairo # for the ihaskell-charts HLS dev environment
+              pkgs.pango # for the ihaskell-diagrams HLS dev environment
+              pkgs.lapack # for the ihaskell-plot HLS dev environment
+              pkgs.blas # for the ihaskell-plot HLS dev environment
             ]);
         in (myModifier myIHaskell).envFunc {withHoogle=true;};
 
diff --git a/hie.yaml b/hie.yaml
index 477e7da0..64094be3 100644
--- a/hie.yaml
+++ b/hie.yaml
@@ -32,3 +32,5 @@ cradle:
       component: "ihaskell-static-canvas:lib:ihaskell-static-canvas"
     - path: "./ihaskell-display/ihaskell-widgets"
       component: "ihaskell-widgets:lib:ihaskell-widgets"
+    - path: "./ihaskell-display/ihaskell-graphviz"
+      component: "ihaskell-graphviz:lib:ihaskell-graphviz"