{
  inputs = {
    nixpkgs.url = "github:nixos/nixpkgs/nixos-unstable";
    from-yaml = {
      url = "github:pegasust/fromYaml";
      flake = false;
    };
  };
  outputs = { nixpkgs, from-yaml, ... }:
    let
      system = "x86_64-linux";
      pkgs = import nixpkgs { inherit system; };
      lib = {
        fromYaml = import "${from-yaml}/fromYaml.nix" { lib = pkgs.lib; };
      };
    in
    {
      inherit nixpkgs;
      inherit from-yaml;
      inherit lib;
      inherit pkgs;
      fromYamlFn = lib.fromYaml;
      yamlCmd = str: (builtins.fromJSON (pkgs.runCommand "echo ${str} | yq"));
      test_0 = ''
        key_bindings:
          - hello:
              "N"
      '';
      key_bind = ''
        key_bindings:
          - { key: N, mods: Control, action: CreateNewWindow }
          # - { key: Paste,                                       action: Paste          }
          # - { key: Copy,                                        action: Copy           }
          #- { key: L,         mods: Control,                    action: ClearLogNotice }
          #- { key: L,         mods: Control, mode: ~Vi|~Search, chars: "\x0c"          }
          #- { key: PageUp,    mods: Shift,   mode: ~Alt,        action: ScrollPageUp   }
          #- { key: PageDown,  mods: Shift,   mode: ~Alt,        action: ScrollPageDown }
          #- { key: Home,      mods: Shift,   mode: ~Alt,        action: ScrollToTop    }
          #- { key: End,       mods: Shift,   mode: ~Alt,        action: ScrollToBottom }

          # Vi Mode
          #- { key: Space,  mods: Shift|Control, mode: ~Search,    action: ToggleViMode            }
          - { key: Escape, mods: Shift, mode: ~Search, action: ToggleViMode }
          #- { key: Space,  mods: Shift|Control, mode: Vi|~Search, action: ScrollToBottom          }
          #- { key: Escape,                      mode: Vi|~Search, action: ClearSelection          }
          #- { key: I,                           mode: Vi|~Search, action: ToggleViMode            }
          #- { key: I,                           mode: Vi|~Search, action: ScrollToBottom          }
          #- { key: C,      mods: Control,       mode: Vi|~Search, action: ToggleViMode            }
          #- { key: Y,      mods: Control,       mode: Vi|~Search, action: ScrollLineUp            }
          #- { key: E,      mods: Control,       mode: Vi|~Search, action: ScrollLineDown          }
          #- { key: G,                           mode: Vi|~Search, action: ScrollToTop             }
          #- { key: G,      mods: Shift,         mode: Vi|~Search, action: ScrollToBottom          }
          #- { key: B,      mods: Control,       mode: Vi|~Search, action: ScrollPageUp            }
          #- { key: F,      mods: Control,       mode: Vi|~Search, action: ScrollPageDown          }
          #- { key: U,      mods: Control,       mode: Vi|~Search, action: ScrollHalfPageUp        }
          #- { key: D,      mods: Control,       mode: Vi|~Search, action: ScrollHalfPageDown      }
          #- { key: Y,                           mode: Vi|~Search, action: Copy                    }
          #- { key: Y,                           mode: Vi|~Search, action: ClearSelection          }
          #- { key: Copy,                        mode: Vi|~Search, action: ClearSelection          }
          #- { key: V,                           mode: Vi|~Search, action: ToggleNormalSelection   }
          #- { key: V,      mods: Shift,         mode: Vi|~Search, action: ToggleLineSelection     }
          #- { key: V,      mods: Control,       mode: Vi|~Search, action: ToggleBlockSelection    }
          #- { key: V,      mods: Alt,           mode: Vi|~Search, action: ToggleSemanticSelection }
          #- { key: Return,                      mode: Vi|~Search, action: Open                    }
          #- { key: Z,                           mode: Vi|~Search, action: CenterAroundViCursor    }
          #- { key: K,                           mode: Vi|~Search, action: Up                      }
          #- { key: J,                           mode: Vi|~Search, action: Down                    }
          #- { key: H,                           mode: Vi|~Search, action: Left                    }
          #- { key: L,                           mode: Vi|~Search, action: Right                   }
          #- { key: Up,                          mode: Vi|~Search, action: Up                      }
          #- { key: Down,                        mode: Vi|~Search, action: Down                    }
          #- { key: Left,                        mode: Vi|~Search, action: Left                    }
          #- { key: Right,                       mode: Vi|~Search, action: Right                   }
          #- { key: Key0,                        mode: Vi|~Search, action: First                   }
          #- { key: Key4,   mods: Shift,         mode: Vi|~Search, action: Last                    }
          #- { key: Key6,   mods: Shift,         mode: Vi|~Search, action: FirstOccupied           }
          #- { key: H,      mods: Shift,         mode: Vi|~Search, action: High                    }
          #- { key: M,      mods: Shift,         mode: Vi|~Search, action: Middle                  }
          #- { key: L,      mods: Shift,         mode: Vi|~Search, action: Low                     }
          #- { key: B,                           mode: Vi|~Search, action: SemanticLeft            }
          #- { key: W,                           mode: Vi|~Search, action: SemanticRight           }
          #- { key: E,                           mode: Vi|~Search, action: SemanticRightEnd        }
          #- { key: B,      mods: Shift,         mode: Vi|~Search, action: WordLeft                }
          #- { key: W,      mods: Shift,         mode: Vi|~Search, action: WordRight               }
          #- { key: E,      mods: Shift,         mode: Vi|~Search, action: WordRightEnd            }
          #- { key: Key5,   mods: Shift,         mode: Vi|~Search, action: Bracket                 }
          #- { key: Slash,                       mode: Vi|~Search, action: SearchForward           }
          #- { key: Slash,  mods: Shift,         mode: Vi|~Search, action: SearchBackward          }
          #- { key: N,                           mode: Vi|~Search, action: SearchNext              }
          #- { key: N,      mods: Shift,         mode: Vi|~Search, action: SearchPrevious          }

          # Search Mode
          #- { key: Return,                mode: Search|Vi,  action: SearchConfirm         }
          #- { key: Escape,                mode: Search,     action: SearchCancel          }
          #- { key: C,      mods: Control, mode: Search,     action: SearchCancel          }
          #- { key: U,      mods: Control, mode: Search,     action: SearchClear           }
          #- { key: W,      mods: Control, mode: Search,     action: SearchDeleteWord      }
          #- { key: P,      mods: Control, mode: Search,     action: SearchHistoryPrevious }
          #- { key: N,      mods: Control, mode: Search,     action: SearchHistoryNext     }
          #- { key: Up,                    mode: Search,     action: SearchHistoryPrevious }
          #- { key: Down,                  mode: Search,     action: SearchHistoryNext     }
          #- { key: Return,                mode: Search|~Vi, action: SearchFocusNext       }
          #- { key: Return, mods: Shift,   mode: Search|~Vi, action: SearchFocusPrevious   }

          # (Windows, Linux, and BSD only)
          - { key: V,              mods: Control|Shift, mode: ~Vi,        action: Paste            }
          - { key: C,              mods: Control|Shift,                   action: Copy             }
      '';
    };
}