diff --git a/src/error.rs b/src/error.rs
index ab6c575..2cf0546 100644
--- a/src/error.rs
+++ b/src/error.rs
@@ -77,6 +77,9 @@ pub enum ErrorKind {
     #[fail(display = "Error loading preset \"{}\"", _0)]
     Preset(String),
 
+    #[fail(display = "Missing environment variables \"{:?}\"", _0)]
+    MissingEnvironmentVariables(Vec<String>),
+
     #[fail(display = "Error executing preset script")]
     PresetScript,
 }
diff --git a/src/presets.rs b/src/presets.rs
index ed32593..01b4b15 100644
--- a/src/presets.rs
+++ b/src/presets.rs
@@ -2,6 +2,7 @@ use crate::error::{Error, ErrorKind};
 use failure::ResultExt;
 use serde::Deserialize;
 use std::collections::HashSet;
+use std::env;
 use std::fs;
 use std::path::{Path, PathBuf};
 use toml;
@@ -11,6 +12,7 @@ use toml;
 struct Preset {
     packages: Option<Vec<String>>,
     script: Option<String>,
+    environment_variables: Option<Vec<String>>,
 }
 
 impl Preset {
@@ -31,20 +33,35 @@ impl Presets {
     pub fn load(list: &[PathBuf]) -> Result<Self, Error> {
         let mut packages = HashSet::new();
         let mut scripts = Vec::new();
+        let mut environment_variables = HashSet::new();
 
         for preset in list {
             let Preset {
                 script,
                 packages: preset_packages,
+                environment_variables: preset_environment_variables,
             } = Preset::load(&preset)?;
 
             if let Some(preset_packages) = preset_packages {
                 packages.extend(preset_packages);
             }
 
+            if let Some(preset_environment_variables) = preset_environment_variables {
+                environment_variables.extend(preset_environment_variables);
+            }
+
             scripts.extend(script);
         }
 
+        let missing_envrionments: Vec<String> = environment_variables
+            .into_iter()
+            .filter(|var| env::var(var).is_err())
+            .collect();
+
+        if !missing_envrionments.is_empty() {
+            Err(ErrorKind::MissingEnvironmentVariables(missing_envrionments))?
+        }
+
         Ok(Self { packages, scripts })
     }
 }