diff --git a/src/goEnvironmentStatus.ts b/src/goEnvironmentStatus.ts
index b236e16..1190b31 100644
--- a/src/goEnvironmentStatus.ts
+++ b/src/goEnvironmentStatus.ts
@@ -32,7 +32,7 @@
 	fixDriveCasingInWindows,
 	getBinPathFromEnvVar,
 	getCurrentGoRoot,
-	pathExists
+	dirExists
 } from './utils/pathUtils';
 import vscode = require('vscode');
 import WebRequest = require('web-request');
@@ -63,6 +63,22 @@
 const CLEAR_SELECTION = '$(clear-all) Clear selection';
 const CHOOSE_FROM_FILE_BROWSER = '$(folder) Choose from file browser';
 
+function canChooseGoEnvironment() {
+	// if there is no workspace, show GOROOT with message
+	if (!vscode.workspace.name) {
+		return { ok: false, reason: 'Switching Go version is not yet supported in single-file mode.' };
+	}
+
+	if (getGoConfig().get('goroot')) {
+		return { ok: false, reason: 'Switching Go version when "go.goroot" is set is unsupported.' };
+	}
+
+	if (process.env['GOROOT']) {
+		return { ok: false, reason: 'Switching Go version when process.env["GOROOT"] is set is unsupported.' };
+	}
+
+	return { ok: true };
+}
 /**
  * Present a command palette menu to the user to select their go binary
  */
@@ -70,12 +86,9 @@
 	if (!goEnvStatusbarItem) {
 		return;
 	}
-
-	// if there is no workspace, show GOROOT with message
-	if (!vscode.workspace.name) {
-		vscode.window.showInformationMessage(
-			`GOROOT: ${getCurrentGoRoot()}. Switching Go version is not yet supported in single-file mode.`
-		);
+	const { ok, reason } = canChooseGoEnvironment();
+	if (!ok) {
+		vscode.window.showInformationMessage(`GOROOT: ${getCurrentGoRoot()}. ${reason}`);
 		return;
 	}
 
@@ -265,7 +278,7 @@
 
 			outputChannel.appendLine('Finding newly downloaded Go');
 			const sdkPath = path.join(os.homedir(), 'sdk');
-			if (!(await pathExists(sdkPath))) {
+			if (!(await dirExists(sdkPath))) {
 				outputChannel.appendLine(`SDK path does not exist: ${sdkPath}`);
 				throw new Error(`SDK path does not exist: ${sdkPath}`);
 			}
@@ -343,9 +356,10 @@
 			for (const term of vscode.window.terminals) {
 				updateIntegratedTerminal(term);
 			}
-			if (!terminalCreationListener) {
-				terminalCreationListener = vscode.window.onDidOpenTerminal(updateIntegratedTerminal);
+			if (terminalCreationListener) {
+				terminalCreationListener.dispose();
 			}
+			terminalCreationListener = vscode.window.onDidOpenTerminal(updateIntegratedTerminal);
 		} else {
 			environmentVariableCollection?.prepend(pathEnvVar, newGoRuntimeBase + path.delimiter);
 		}
@@ -439,7 +453,7 @@
 	// get list of Go versions
 	const sdkPath = path.join(os.homedir(), 'sdk');
 
-	if (!(await pathExists(sdkPath))) {
+	if (!(await dirExists(sdkPath))) {
 		return [];
 	}
 	const readdir = promisify(fs.readdir);
diff --git a/src/goMain.ts b/src/goMain.ts
index 0fcd4e5..28e4956 100644
--- a/src/goMain.ts
+++ b/src/goMain.ts
@@ -96,7 +96,7 @@
 	isGoPathSet,
 	resolvePath
 } from './util';
-import { clearCacheForTools, fileExists, getCurrentGoRoot, setCurrentGoRoot } from './utils/pathUtils';
+import { clearCacheForTools, fileExists, getCurrentGoRoot, dirExists, setCurrentGoRoot } from './utils/pathUtils';
 import { WelcomePanel } from './welcome';
 import semver = require('semver');
 import vscode = require('vscode');
@@ -151,8 +151,11 @@
 
 	const configGOROOT = getGoConfig()['goroot'];
 	if (configGOROOT) {
-		logVerbose(`go.goroot = '${configGOROOT}'`);
-		setCurrentGoRoot(resolvePath(configGOROOT));
+		const goroot = resolvePath(configGOROOT);
+		if (dirExists(goroot)) {
+			logVerbose(`setting GOROOT = ${goroot} because "go.goroot": "${configGOROOT}"`);
+			process.env['GOROOT'] = goroot;
+		}
 	}
 
 	// Present a warning about the deprecation of the go.documentLink setting.
@@ -443,6 +446,17 @@
 			}
 			const updatedGoConfig = getGoConfig();
 
+			if (e.affectsConfiguration('go.goroot')) {
+				const configGOROOT = updatedGoConfig['goroot'];
+				if (configGOROOT) {
+					const goroot = resolvePath(configGOROOT);
+					const oldGoroot = process.env['GOROOT'];
+					if (oldGoroot !== goroot && dirExists(goroot)) {
+						logVerbose(`setting GOROOT = ${goroot} because "go.goroot": "${configGOROOT}"`);
+						process.env['GOROOT'] = goroot;
+					}
+				}
+			}
 			if (
 				e.affectsConfiguration('go.goroot') ||
 				e.affectsConfiguration('go.alternateTools') ||
diff --git a/src/util.ts b/src/util.ts
index 00fe941..b68f378 100644
--- a/src/util.ts
+++ b/src/util.ts
@@ -509,15 +509,17 @@
 	const alternateTools: { [key: string]: string } = cfg.get('alternateTools');
 	const alternateToolPath: string = alternateTools[tool];
 
+	const gorootInSetting = resolvePath(cfg.get('goroot'));
+
 	let selectedGoPath: string | undefined;
-	if (tool === 'go') {
+	if (tool === 'go' && !gorootInSetting) {
 		selectedGoPath = getFromWorkspaceState('selectedGo')?.binpath;
 	}
 
 	return getBinPathWithPreferredGopathGorootWithExplanation(
 		tool,
 		tool === 'go' ? [] : [getToolsGopath(), getCurrentGoPath()],
-		tool === 'go' && cfg.get('goroot') ? resolvePath(cfg.get('goroot')) : undefined,
+		tool === 'go' ? gorootInSetting : undefined,
 		selectedGoPath ?? resolvePath(alternateToolPath),
 		useCache
 	);
diff --git a/src/utils/pathUtils.ts b/src/utils/pathUtils.ts
index bbe35d9..7f68ce5 100644
--- a/src/utils/pathUtils.ts
+++ b/src/utils/pathUtils.ts
@@ -163,7 +163,7 @@
 	}
 }
 
-export async function pathExists(p: string): Promise<boolean> {
+export async function dirExists(p: string): Promise<boolean> {
 	try {
 		const stat = promisify(fs.stat);
 		return (await stat(p)).isDirectory();