add flake

.gitignore

@@ -1 +1,83 @@
 *.pdf
+
+# Created by https://www.toptal.com/developers/gitignore/api/linux,windows,macos,direnv
+# Edit at https://www.toptal.com/developers/gitignore?templates=linux,windows,macos,direnv
+
+### direnv ###
+.direnv
+.envrc
+
+### Linux ###
+*~
+
+# temporary files which can be created if a process still has a handle open of a deleted file
+.fuse_hidden*
+
+# KDE directory preferences
+.directory
+
+# Linux trash folder which might appear on any partition or disk
+.Trash-*
+
+# .nfs files are created when an open file is removed but is still being accessed
+.nfs*
+
+### macOS ###
+# General
+.DS_Store
+.AppleDouble
+.LSOverride
+
+# Icon must end with two \r
+Icon
+
+# Thumbnails
+._*
+
+# Files that might appear in the root of a volume
+.DocumentRevisions-V100
+.fseventsd
+.Spotlight-V100
+.TemporaryItems
+.Trashes
+.VolumeIcon.icns
+.com.apple.timemachine.donotpresent
+
+# Directories potentially created on remote AFP share
+.AppleDB
+.AppleDesktop
+Network Trash Folder
+Temporary Items
+.apdisk
+
+### macOS Patch ###
+# iCloud generated files
+*.icloud
+
+### Windows ###
+# Windows thumbnail cache files
+Thumbs.db
+Thumbs.db:encryptable
+ehthumbs.db
+ehthumbs_vista.db
+
+# Dump file
+*.stackdump
+
+# Folder config file
+[Dd]esktop.ini
+
+# Recycle Bin used on file shares
+$RECYCLE.BIN/
+
+# Windows Installer files
+*.cab
+*.msi
+*.msix
+*.msm
+*.msp
+
+# Windows shortcuts
+*.lnk
+
+# End of https://www.toptal.com/developers/gitignore/api/linux,windows,macos,direnv

flake.nix

@@ -0,0 +1,25 @@
+{
+  description = "slides for talks";
+
+  inputs = {
+    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
+    flake-utils.url = "github:numtide/flake-utils";
+  };
+
+  outputs = { self, nixpkgs, flake-utils }:
+    (flake-utils.lib.eachDefaultSystem
+      (system:
+        let
+          pkgs = import nixpkgs { inherit system; };
+        in
+        {
+          formatter = pkgs.nixpkgs-fmt;
+          devShells.default = pkgs.mkShell {
+            packages = with pkgs; [
+              gnumake
+              marp-cli
+            ];
+          };
+        })
+    );
+}