diff --git a/core/src/inner.rs b/core/src/inner.rs
index 16d12cbe..91ceb3f1 100644
--- a/core/src/inner.rs
+++ b/core/src/inner.rs
@@ -111,10 +111,12 @@ fn default_true() -> bool {
 }
 
 #[derive(Deserialize)]
-#[serde(rename_all = "snake_case")]
 enum EntryType {
+    #[serde(rename = "entries")]
     Entries(Vec<Entry>),
+    #[serde(rename = "command")]
     Command(String),
+    #[serde(rename = "script")]
     Script(PathBuf),
 }
 
@@ -130,16 +132,15 @@ impl Entry {
                     match data {
                         SystemDataType::Environment(var_name) => std::env::var(var_name)
                             .is_ok_and(|var| values.contains(&var) == *matches),
-                        SystemDataType::ContainingFile(file) => std::fs::read_to_string(file)
-                            .is_ok_and(|data| {
-                                values
-                                    .iter()
-                                    .all(|matching| data.contains(matching) == *matches)
-                            }),
+                        SystemDataType::File(path) => path.exists() == *matches,
                         SystemDataType::CommandExists => values
                             .iter()
                             .all(|command| which::which(command).is_ok() == *matches),
-                        SystemDataType::FileExists => values.iter().all(|p| Path::new(p).is_file()),
+                        SystemDataType::FileContains { file, contains } => {
+                            std::fs::read_to_string(file)
+                                .map(|content| content.contains(contains) == *matches)
+                                .unwrap_or(false)
+                        }
                     }
                 },
             )
@@ -157,12 +158,15 @@ struct Precondition {
 }
 
 #[derive(Deserialize)]
-#[serde(rename_all = "snake_case")]
 enum SystemDataType {
+    #[serde(rename = "environment")]
     Environment(String),
-    ContainingFile(PathBuf),
-    FileExists,
+    #[serde(rename = "file")]
+    File(PathBuf),
+    #[serde(rename = "command_exists")]
     CommandExists,
+    #[serde(untagged)]
+    FileContains { file: PathBuf, contains: String },
 }
 
 fn filter_entries(entries: &mut Vec<Entry>) {
diff --git a/core/tabs/system-setup/tab_data.toml b/core/tabs/system-setup/tab_data.toml
index 51aa4745..29015bda 100644
--- a/core/tabs/system-setup/tab_data.toml
+++ b/core/tabs/system-setup/tab_data.toml
@@ -23,15 +23,15 @@ task_list = "I MP"
 multi_select = false
 
 [[data.entries]]
-name = "Linux Neptune for SteamDeck"
+name ="Linux Neptune for SteamDeck"
 description = "Valve's fork of Linux Kernel for the SteamDeck"
 script = "arch/linux-neptune.sh"
 task_list = "I PFM K"
 
 [[data.entries.preconditions]]
 matches = true
-data = { containing_file = "/sys/devices/virtual/dmi/id/board_vendor" }
-values = ["Valve"]
+data = { file = "/sys/devices/virtual/dmi/id/board_vendor" }
+values = [ "Valve" ]
 
 [[data.entries]]
 name = "Nvidia Drivers && Hardware Acceleration"
@@ -62,8 +62,8 @@ name = "Debian"
 
 [[data.preconditions]]
 matches = true
-data = { containing_file = "/etc/os-release" }
-values = ["ID=debian"]
+data = { file = "/etc/os-release", contains = "ID=debian" }
+values = []
 
 [[data.entries]]
 name = "Hyprland JaKooLit"
@@ -130,15 +130,15 @@ task_list = "I PFM SS"
 [[data.preconditions]]
 matches = true
 data = "command_exists"
-values = ["btrfs"]
+values = [ "btrfs" ]
 
 [[data]]
 name = "Ubuntu"
 
 [[data.preconditions]]
 matches = true
-data = { containing_file = "/etc/os-release" }
-values = ["ID=ubuntu"]
+data = { file = "/etc/os-release", contains = "ID=ubuntu" }
+values = []
 
 [[data.entries]]
 name = "Hyprland JaKooLit"
@@ -148,8 +148,8 @@ task_list = "I MP"
 
 [[data.preconditions]]
 matches = true
-data = { containing_file = "/etc/os-release" }
-values = ['VERSION_ID="24.04"']
+data = { file = "/etc/os-release", contains = 'VERSION_ID="24.04"' }
+values = []
 
 [[data]]
 name = "Build Prerequisites"