diff --git a/nixide-sys/include/nix-expr.h b/nixide-sys/include/nix-expr.h
index 02f48ea..b20d63b 100644
--- a/nixide-sys/include/nix-expr.h
+++ b/nixide-sys/include/nix-expr.h
@@ -1,6 +1,3 @@
-#ifndef NIXIDE_EXPR
-#define NIXIDE_EXPR
-
 // Nix C API for the Nix expressions evaluator.
 #include <nix_api_expr.h>
 
@@ -11,5 +8,3 @@
 // Nix C API for external values.
 //
 #include <nix_api_external.h>
-
-#endif
diff --git a/nixide-sys/include/nix-fetchers.h b/nixide-sys/include/nix-fetchers.h
index 805a84b..4e80a28 100644
--- a/nixide-sys/include/nix-fetchers.h
+++ b/nixide-sys/include/nix-fetchers.h
@@ -1,8 +1,3 @@
-#ifndef NIXIDE_FETCHERS
-#define NIXIDE_FETCHERS
-
 // Nix C API for fetcher operations.
 //
 #include <nix_api_fetchers.h>
-
-#endif
diff --git a/nixide-sys/include/nix-flake.h b/nixide-sys/include/nix-flake.h
index 5bd3d3b..e07cfab 100644
--- a/nixide-sys/include/nix-flake.h
+++ b/nixide-sys/include/nix-flake.h
@@ -1,8 +1,3 @@
-#ifndef NIXIDE_FLAKE
-#define NIXIDE_FLAKE
-
 // Nix C API for flake support.
 //
 #include <nix_api_flake.h>
-
-#endif
diff --git a/nixide-sys/include/nix-main.h b/nixide-sys/include/nix-main.h
index b2320d9..7815125 100644
--- a/nixide-sys/include/nix-main.h
+++ b/nixide-sys/include/nix-main.h
@@ -1,8 +1,3 @@
-#ifndef NIXIDE_MAIN
-#define NIXIDE_MAIN
-
 // Nix C API for CLI support.
 //
 #include <nix_api_main.h>
-
-#endif
diff --git a/nixide-sys/include/nix-store.h b/nixide-sys/include/nix-store.h
index 8ad9413..239bde5 100644
--- a/nixide-sys/include/nix-store.h
+++ b/nixide-sys/include/nix-store.h
@@ -1,8 +1,3 @@
-#ifndef NIXIDE_STORE
-#define NIXIDE_STORE
-
 // Nix C API for store operations.
 //
 #include <nix_api_store.h>
-
-#endif
diff --git a/nixide-sys/include/nix-util.h b/nixide-sys/include/nix-util.h
index 59690ee..8d60eed 100644
--- a/nixide-sys/include/nix-util.h
+++ b/nixide-sys/include/nix-util.h
@@ -1,6 +1,3 @@
-#ifndef NIXIDE_UTIL
-#define NIXIDE_UTIL
-
 // Nix C API for utilities.
 //
 // Most notably containing functions for handling
@@ -8,5 +5,3 @@
 // the Nix C APIs for error handling.
 //
 #include <nix_api_util.h>
-
-#endif
diff --git a/rustfmt.toml b/rustfmt.toml
index ece99fb..3a45084 100644
--- a/rustfmt.toml
+++ b/rustfmt.toml
@@ -1,80 +1,5 @@
-# REF: https://github.com/rust-lang/rustfmt/blob/main/Configurations.md
-array_width = 60
-attr_fn_like_width = 70
-binop_separator = "Front" # Front|Back
-blank_lines_lower_bound = 1
-black_lines_upper_bound = 1
-brace_style = "SameLineWhere" # AlwaysNextLine|PreferSameLine|SameLineWhere
-chain_width = 60
-color = "Auto" # Auto|Always|Never
-combine_control_expr = false
-comment_width = 80
-condense_wildcard_suffixes = true
-control_brace_style = "AlwaysSameLine" # AlwaysNextLine|AlwaysSameLine|ClosingNextLine
-disable_all_formatting = false # hell no
-edition = "2024" # 2015|2018|2021|2024
-empty_item_single_line = true
-enum_discrim_align_threshold = 20
-error_on_line_overflow = false
-error_on_unformatted = true
-fn_call_width = 60
-fn_params_layout = "Tall" # Compressed|Tall|Vertical
-fn_single_line = true
-force_explicit_abi = true
-force_multiline_blocks = false
-format_code_in_doc_comments = true
-doc_comment_code_block_width = 100
-format_generated_files = true
-generated_marker_line_search_limit = 5
-format_macro_matches = true
-format_macro_bodies = true
-skip_macro_invocations = []
 format_strings = true
-hard_tabs = false # fuck tabs
-hex_literal_case = "Lower" # Preserve|Upper|Lower
-float_literal_trailing_zero = "Never" # Preserve|Always|IfNoPostfix|Never
-show_parse_errors = true
-# ignore = [] # same format as .gitignore
-imports_indent = "Block" # Block|Visual
-imports_layout = "HorizontalVertical" # Horizontal|Vertical|HorizontalVertical|Mixed
-indent_style = "Block" # Block|Visual
-inline_attribute_width = 0
-match_arm_blocks = true
-match_arm_leading_pipes = "Always" # Preserve|Always|Never
-match_arm_indent = true
-match_block_trailing_comma = true
-max_width = 100
-merge_derives = true
-imports_granularity = "One" # Preserve|Crate|Module|Item|One
-newline_style = "Unix" # Auto|Native|Unix|Windows
-normalize_comments = true
-normalize_doc_attributes = true
-overflow_delimited_expr = true
-remove_nested_parens = true
+group_imports = "Preserve"
+imports_granularity = "Module"
 reorder_impl_items = true
-reorder_imports = true
-group_imports = "StdExternalCrate" # Preserve|StdExternalCrate|One
-reorder_modules = true
-required_version = "1.8.0" # rustfmt version
-short_array_element_width_threshold = 10
-skip_children = false
-single_line_if_else_max_width = 50
-single_line_let_else_max_width = 50
-space_after_colon = true
-space_before_colon = false
-spaces_around_ranges = false
-struct_field_align_threshold = 20
-struct_lit_single_line = true
-struct_lit_width = 18
-struct_variant_width = 35
-style_edition = "2024" # 2015|2018|2021|2024(unstable variant)
-tab_spaces = 4
-trailing_comma = "Always" # Vertical|Always|Never
-trailing_semicolon = true
-type_punctuation_density = "Wide" # Compressed|Wide
-unstable_features = true
-use_field_init_shorthand = true
-use_small_heuristics = "Default" # Default|Off|Max
-use_try_shorthand = true
-where_single_line = false
 wrap_comments = true