diff --git a/Readme.md b/Readme.md
index 97956ec..537506c 100644
--- a/Readme.md
+++ b/Readme.md
@@ -49,11 +49,18 @@ Install the `gfortran` compiler, then:
 ```bash
 cd trimsp/fortran
 make
-make install
 ```
-    
-This will install the `trimspNL` binary in `/usr/local/bin`,
-but it can be moved to any other directory in your `PATH`.
+
+This creates the `trimspNL` binary in the repository root. For packaged
+Electron builds, copy or rebuild it into:
+
+```text
+resources/bin/trimspNL
+```
+
+The application will prefer that bundled copy when running from a packaged
+install. During development it can still use a local checkout copy or a
+`trimspNL` binary found in the configured path or in `PATH`.
 
 ###### Running the GUI ######
 
@@ -75,11 +82,14 @@ Install [Node.js] (`nodejs`, `nodejs-libs` and `npm`), then run:
 
 ```bash
 cd trimsp
+cp trimspNL resources/bin/trimspNL
 npm install
 npm run make
 ```
 
 This uses Electron Forge to build Linux packages from the current checkout.
+The packaged application bundles `resources/bin/trimspNL` inside the app
+resources, so make sure that file exists and is up to date before packaging.
 
 The generated files are written under:
 
diff --git a/TrimSPelec.js b/TrimSPelec.js
index 1cefe51..bf9dcce 100644
--- a/TrimSPelec.js
+++ b/TrimSPelec.js
@@ -73,6 +73,25 @@ function fileExists(filename) {
     return 0;
 }
 
+function getTrimBinaryPath(configuredPath) {
+    const candidates = [];
+    if (configuredPath) {
+	candidates.push(path.join(configuredPath, "trimspNL"));
+    }
+    if (process.resourcesPath) {
+	candidates.push(path.join(process.resourcesPath, "bin", "trimspNL"));
+	candidates.push(path.join(process.resourcesPath, "trimspNL"));
+    }
+    candidates.push(path.join(process.cwd(), "trimspNL"));
+
+    for (const candidate of candidates) {
+	if (fileExists(candidate)) {
+	    return candidate;
+	}
+    }
+    return "trimspNL";
+}
+
 function setWorkFolder(foldername) {
     const folder = Array.isArray(foldername) ? foldername[0] : foldername;
     if (folder) {
diff --git a/TrimSPlib.js b/TrimSPlib.js
index 62f132d..b69f8e7 100644
--- a/TrimSPlib.js
+++ b/TrimSPlib.js
@@ -3607,15 +3607,7 @@ async function startSequence() {
     let webOrApp = amIWeb();
     // Only for Node.js 
     if (!webOrApp) {
-	// Check if the trimspNL binary is found
-	if (!fileExists(trimBin)) {
-	    // check if it is in rpm
-	    trimBin = "/usr/lib/TrimSP/resources/app/trimspNL";
-	    if (!fileExists(trimBin)) {
-		// if not found, try in PATH and hope for the best
-		trimBin = "trimspNL";
-	    }
-	}
+	trimBin = getTrimBinaryPath(All["trimPath"]);
 	// Check if workPath exists otherwise create it
 	checkDir(All['workPath']); // from TrimSPelec.js, Electron/Node specific
     } else {
diff --git a/package.json b/package.json
index 592c492..01f6ebb 100644
--- a/package.json
+++ b/package.json
@@ -29,6 +29,9 @@
     "forge": {
       "packagerConfig": {
         "icon": "appicons/icons/png/1024x1024.png",
+        "extraResource": [
+          "resources/bin"
+        ],
         "ignore": [
           "Readme.md",
           "ToDo.txt",
diff --git a/resources/bin/trimspNL b/resources/bin/trimspNL
new file mode 100755
index 0000000..c84d1ad
Binary files /dev/null and b/resources/bin/trimspNL differ