Split out hm/common

I went nuclear...

hm/dev/c.nix

@@ -11,18 +11,23 @@
         "ddd"
         "ghidra"
       ];
-      shellAliases = {
-        gdb = "gdb -x ${config.xdg.configHome}/gdbinit";
+    };
+    home = {
+      packages = with pkgs; [
+        binwalk
+        ccache
+        clang
+        cmake
+        ddd
+        gdb
+      ];
+      sessionVariables = {
+        CCACHE_CONFIGPATH = "${config.xdg.configHome}/ccache.conf";
       };
     };
-    home.packages = with pkgs; [
-      binwalk
-      ccache
-      clang
-      cmake
-      ddd
-      gdb
-    ];
+    programs.bash.shellAliases = {
+      gdb = "gdb -x ${config.xdg.configHome}/gdbinit";
+    };
     programs.nixvim.extraPlugins = [ pkgs.vimPlugins.nvim-dap ]; # Debug Adapter Protocol client
     xdg.configFile = {
       "ccache.conf" = {