[fIXUP]

.github/workflows/build.yml

@@ -108,7 +108,7 @@ jobs:
 
     - name: Test native launcher and executable
       env:
-        rt.equinox.binaries.loc: ${{ github.workspace }}/equinox.binaries
+        EQUINOX_BINARIES_LOC: ${{ github.workspace }}/equinox.binaries
       run: mvn -B -pl org.eclipse.equinox:org.eclipse.equinox.launcher.tests -am verify
 
     - name: Upload artifacts

Jenkinsfile

@@ -20,6 +20,9 @@ pipeline {
 			}
 		}
 		stage('Build') {
+			environment { 
+				EQUINOX_BINARIES_LOC = "$WORKSPACE/rt.equinox.binaries"
+			}
 			steps {
 				sh """
 				mvn clean verify --batch-mode --fail-at-end -Dmaven.repo.local=$WORKSPACE/.m2/repository \

bundles/org.eclipse.equinox.launcher.tests/src/org/eclipse/equinox/launcher/tests/LauncherTests.java

@@ -111,7 +111,7 @@ static void prepareLauncherSetup() throws Exception {
 			versions.load(in);
 		}
 		String launcherLibrary = "eclipse_" + versions.get("maj_ver") + versions.get("min_ver")
-				+ (os.contains("win") ? ".dll" : ".so");
+		+ (os.contains("win") ? ".dll" : ".so");
 		String launcherLibFile = "org.eclipse.equinox.launcher." + ws + "." + os + "." + arch + "/" + launcherLibrary;
 		Files.copy(binariesRoot.resolve(launcherLibFile),
 				Files.createDirectories(eclipseInstallationMockLocation.resolve("plugins/org.eclipse.equinox.launcher"))
@@ -134,16 +134,16 @@ static void prepareLauncherSetup() throws Exception {
 	}
 
 	private static Path findBinariesRoot(Path equinoxRepositoryPath) {
-		String binariesRootName = "rt.equinox.binaries.loc";
-		Optional<Path> binariesRepo = Optional
-				.ofNullable(System.getProperty(binariesRootName, System.getenv(binariesRootName))).map(Path::of);
+		String binariesLocationName = "EQUINOX_BINARIES_LOC"; // dots in variable names are not permitted in POSIX
+		Optional<Path> binariesRepo = Optional.ofNullable(System.getProperty(binariesLocationName))
+				.or(() -> Optional.ofNullable(System.getenv(binariesLocationName))).map(Path::of);
 		if (binariesRepo.isEmpty()) { // search for co-located repository with known names
 			binariesRepo = Stream.of("equinox.binaries", "rt.equinox.binaries")
 					.map(equinoxRepositoryPath::resolveSibling).filter(Files::isDirectory).findFirst();
 		}
 		return binariesRepo.orElseThrow(() -> new IllegalStateException(
 				"Location of equinox binaries could not be auto-detected and was not provided via the System.property or environment.variable '"
-						+ binariesRootName + "'."));
+						+ binariesLocationName + "'."));
 	}
 
 	private static void addProjectsClassFiles(JarOutputStream jar, Path classesFolder) throws IOException {