diff --git a/fimt.toml b/fimt.toml
index 5e6e1d7..b50afbb 100644
--- a/fimt.toml
+++ b/fimt.toml
@@ -1,3 +1,6 @@
+[direnv]
+nix = "flake"
+
 [gitignore]
 direnv = true
 rust = true
diff --git a/src/cli/direnv.rs b/src/cli/direnv.rs
index 73aa9a3..6fb1aa2 100644
--- a/src/cli/direnv.rs
+++ b/src/cli/direnv.rs
@@ -1,24 +1,34 @@
-use crate::module::direnv::DirenvModuleArgs;
+use crate::module::direnv::{DirenvModuleArgs, DirenvNixFunction};
 
 #[derive(Debug, Clone, clap::ValueEnum)]
 pub enum DirenvCliNixValue {
     Flake,
     Shell,
 }
+impl From<DirenvCliNixValue> for DirenvNixFunction {
+    fn from(value: DirenvCliNixValue) -> Self {
+        match value {
+            DirenvCliNixValue::Flake => DirenvNixFunction::Flake,
+            DirenvCliNixValue::Shell => DirenvNixFunction::Shell,
+        }
+    }
+}
 
 #[derive(Debug, Clone, clap::Args)]
 pub struct DirenvModuleCliArgs {
     #[clap(long)]
     pub nix: Option<DirenvCliNixValue>,
     #[clap(long)]
+    pub nix_args: Option<String>,
+    #[clap(long)]
     pub nodejs: bool,
 }
 
 impl From<DirenvModuleCliArgs> for DirenvModuleArgs {
     fn from(args: DirenvModuleCliArgs) -> Self {
         DirenvModuleArgs {
-            nix_shell: matches!(args.nix, Some(DirenvCliNixValue::Shell)),
-            nix_flake: matches!(args.nix, Some(DirenvCliNixValue::Flake)),
+            nix: args.nix.map(From::from),
+            nix_args: args.nix_args,
             nodejs: args.nodejs,
         }
     }
diff --git a/src/config/direnv.rs b/src/config/direnv.rs
index 24626e2..a4f64fa 100644
--- a/src/config/direnv.rs
+++ b/src/config/direnv.rs
@@ -1,4 +1,4 @@
-use crate::module::direnv::DirenvModuleArgs;
+use crate::module::direnv::{DirenvModuleArgs, DirenvNixFunction};
 
 #[derive(Default, serde::Deserialize, serde::Serialize)]
 pub struct DirenvModuleConfig {
@@ -9,14 +9,18 @@ pub struct DirenvModuleConfig {
 impl From<DirenvModuleConfig> for DirenvModuleArgs {
     fn from(cfg: DirenvModuleConfig) -> Self {
         DirenvModuleArgs {
-            nix_shell: cfg
+            nix: cfg
                 .nix
-                .map(|v| v.to_lowercase() == "shell")
-                .unwrap_or_default(),
-            nix_flake: cfg
-                .nix
-                .map(|v| v.to_lowercase() == "flake")
-                .unwrap_or_default(),
+                .clone()
+                .and_then(|v| match v.split_whitespace().next() {
+                    Some("flake") => Some(DirenvNixFunction::Flake),
+                    Some("shell") => Some(DirenvNixFunction::Shell),
+                    _ => None,
+                }),
+            nix_args: cfg.nix.and_then(|v| match v.split_once(" ") {
+                Some((_, args)) => Some(String::from(args)),
+                None => None,
+            }),
             nodejs: cfg.nodejs.unwrap_or_default(),
         }
     }
diff --git a/src/module/direnv.rs b/src/module/direnv.rs
index a3a61c6..17a528f 100644
--- a/src/module/direnv.rs
+++ b/src/module/direnv.rs
@@ -2,29 +2,41 @@ use std::collections::HashMap;
 
 use super::Module;
 
-const NIX_SHELL_PART: &str = "\
-# nix
-use nix";
-
-const NIX_FLAKE_PART: &str = "\
-# nix
-use flake";
-
 const NODEJS_PART: &str = "\
 # nodejs
 layout node";
 
+pub enum DirenvNixFunction {
+    Flake,
+    Shell,
+}
+impl std::fmt::Display for DirenvNixFunction {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        match self {
+            Self::Flake => f.write_str("flake"),
+            Self::Shell => f.write_str("nix"),
+        }
+    }
+}
+
 pub struct DirenvModuleArgs {
-    pub nix_shell: bool,
-    pub nix_flake: bool,
+    pub nix: Option<DirenvNixFunction>,
+    pub nix_args: Option<String>,
     pub nodejs: bool,
 }
 
 fn make_gitignore_content(args: DirenvModuleArgs) -> String {
     [
-        args.nix_shell.then_some(NIX_SHELL_PART),
-        args.nix_flake.then_some(NIX_FLAKE_PART),
-        args.nodejs.then_some(NODEJS_PART),
+        args.nix.map(|function| {
+            format!(
+                "# nix\nuse {} {}",
+                function,
+                args.nix_args.unwrap_or_default()
+            )
+            .trim_end()
+            .to_owned()
+        }),
+        args.nodejs.then_some(NODEJS_PART.to_string()),
     ]
     .iter()
     .flatten()