diff --git a/gui/src/installer/step/mod.rs b/gui/src/installer/step/mod.rs
index 5b98bd40d..e90a08b30 100644
--- a/gui/src/installer/step/mod.rs
+++ b/gui/src/installer/step/mod.rs
@@ -68,7 +68,7 @@ pub struct DefineBitcoind {
 }
 
 pub struct StartInternalBitcoindStep {
-    conf_path: PathBuf,
+    bitcoind_datadir: PathBuf,
     network: Network,
     started: Option<Result<std::process::Child, std::io::Error>>,
     exe_path: Option<PathBuf>,
@@ -92,7 +92,6 @@ pub struct InternalBitcoindNetworkConfig {
 pub struct InternalBitcoindConfig {
     #[cfg(unix)]
     daemonwait: bool, // Used instead of `daemon` to ensure RPC server is running before exiting.
-    data_dir: PathBuf,
     networks: HashMap<Network, InternalBitcoindNetworkConfig>,
 }
 
@@ -119,12 +118,17 @@ impl std::fmt::Display for InternalBitcoindConfigError {
     }
 }
 
+impl Default for InternalBitcoindConfig {
+    fn default() -> Self {
+        Self::new()
+    }
+}
+
 impl InternalBitcoindConfig {
-    pub fn new(data_dir: PathBuf) -> Self {
+    pub fn new() -> Self {
         Self {
             #[cfg(unix)]
             daemonwait: true,
-            data_dir,
             networks: HashMap::new(),
         }
     }
@@ -140,12 +144,6 @@ impl InternalBitcoindConfig {
             .get("daemonwait")
             .map(|v| v == "1")
             .ok_or_else(|| InternalBitcoindConfigError::KeyNotFound("daemonwait".to_string()))?;
-        let data_dir = PathBuf::from_str(
-            gen_sec
-                .get("datadir")
-                .ok_or_else(|| InternalBitcoindConfigError::KeyNotFound("datadir".to_string()))?,
-        )
-        .map_err(|e| InternalBitcoindConfigError::CouldNotParseValue(e.to_string()))?;
 
         let mut networks = HashMap::new();
         for (maybe_sec, prop) in &conf_ini {
@@ -180,7 +178,6 @@ impl InternalBitcoindConfig {
         Ok(Self {
             #[cfg(unix)]
             daemonwait,
-            data_dir,
             networks,
         })
     }
@@ -199,9 +196,6 @@ impl InternalBitcoindConfig {
         conf_ini
             .with_general_section()
             .set("daemonwait", if self.daemonwait { "1" } else { "0" });
-        conf_ini
-            .with_general_section()
-            .set("datadir", self.data_dir.to_string_lossy());
 
         for (network, network_conf) in &self.networks {
             conf_ini
@@ -367,7 +361,8 @@ impl Step for SelectBitcoindTypeStep {
                     conf
                 } else {
                     // TODO: Should the `else` only apply for "file not found" error?
-                    InternalBitcoindConfig::new(internal_bitcoind_datadir(&ctx.data_dir))
+                    // In case of error while parsing existing file, we may overwrite values from other networks by creating new config.
+                    InternalBitcoindConfig::new()
                 };
                 // Insert entry for network if not present.
                 if conf.networks.get(&ctx.bitcoin_config.network).is_none() {
@@ -561,7 +556,7 @@ impl From<StartInternalBitcoindStep> for Box<dyn Step> {
 impl StartInternalBitcoindStep {
     pub fn new(liana_datadir: &PathBuf) -> Self {
         Self {
-            conf_path: internal_bitcoind_config_path(liana_datadir),
+            bitcoind_datadir: internal_bitcoind_datadir(liana_datadir),
             network: Network::Bitcoin,
             started: None,
             exe_path: None,
@@ -581,9 +576,13 @@ impl Step for StartInternalBitcoindStep {
             match msg {
                 message::StartInternalBitcoindMsg::Start => {
                     if let Some(path) = &self.exe_path {
+                        let datadir = self
+                            .bitcoind_datadir
+                            .canonicalize()
+                            .expect("Failed to canonicalize bitcoind datadir path");
                         let args = vec![
-                            format!("-chain={}", self.network.to_core_arg()),
-                            format!("-conf={}", self.conf_path.to_string_lossy()),
+                            format!("-chain={}", &self.network.to_core_arg()),
+                            format!("-datadir={}", &datadir.to_string_lossy()),
                         ];
                         let res = std::process::Command::new(path)
                             .args(&args)