diff --git a/default-configuration.nix b/default-configuration.nix
index 3f3b304..5ad88bb 100644
--- a/default-configuration.nix
+++ b/default-configuration.nix
@@ -177,6 +177,12 @@
             version = "5.0.0";
             sha256 = "sha256-/gLvhw0XcUb6Jch/LZ4k7xpSS9wdYWVf5u7uvOHS+i8=";
           }
+          {
+            name = "vscode-mermaid-chart";
+            publisher = "mermaidchart";
+            version = "2.7.2";
+            sha256 = "sha256-hXJPKvmXpJi54O6xSJFR20jHOS6hzyPGFTu7JDSKe2s=";
+          }
         ];
       };
     };
@@ -227,6 +233,7 @@
       android-tools # phone rdp
       wireguard-tools
       blender # drone
+      gnumake # make & makefile
     ];
   };