diff --git a/editors/code/src/config.ts b/editors/code/src/config.ts
index 9b8ac666ce..ba1c3b01de 100644
--- a/editors/code/src/config.ts
+++ b/editors/code/src/config.ts
@@ -2,7 +2,7 @@ import * as Is from "vscode-languageclient/lib/common/utils/is";
 import * as os from "os";
 import * as path from "path";
 import * as vscode from "vscode";
-import { expectNotUndefined, log, unwrapUndefinable } from "./util";
+import { expectNotUndefined, log, normalizeDriveLetter, unwrapUndefinable } from "./util";
 import type { Env } from "./util";
 import type { Disposable } from "vscode";
 
@@ -498,7 +498,7 @@ function computeVscodeVar(varName: string): string | null {
                   // user has opened on Editor startup. Could lead to
                   // unpredictable workspace selection in practice.
                   // It's better to pick the first one
-                  folder.uri.fsPath;
+                  normalizeDriveLetter(folder.uri.fsPath);
         return fsPath;
     };
     // https://code.visualstudio.com/docs/editor/variables-reference
diff --git a/editors/code/src/debug.ts b/editors/code/src/debug.ts
index a04a6db7ad..adb75c23c7 100644
--- a/editors/code/src/debug.ts
+++ b/editors/code/src/debug.ts
@@ -6,7 +6,7 @@ import type * as ra from "./lsp_ext";
 import { Cargo } from "./toolchain";
 import type { Ctx } from "./ctx";
 import { createTaskFromRunnable, prepareEnv } from "./run";
-import { execute, isCargoRunnableArgs, unwrapUndefinable, log } from "./util";
+import { execute, isCargoRunnableArgs, unwrapUndefinable, log, normalizeDriveLetter } from "./util";
 import type { Config } from "./config";
 
 // Here we want to keep track on everything that's currently running
@@ -127,20 +127,14 @@ async function getDebugConfiguration(
               firstWorkspace;
 
     const workspace = unwrapUndefinable(maybeWorkspace);
-    let wsFolder = path.normalize(workspace.uri.fsPath);
-    if (os.platform() === "win32") {
-        // in windows, the drive letter can vary in casing for VSCode, so we gotta normalize that first
-        wsFolder = wsFolder.replace(/^[a-z]:\\/, (c) => c.toUpperCase());
-    }
+    const wsFolder = normalizeDriveLetter(path.normalize(workspace.uri.fsPath));
 
     const workspaceQualifier = isMultiFolderWorkspace ? `:${workspace.name}` : "";
     function simplifyPath(p: string): string {
         // in windows, the drive letter can vary in casing for VSCode, so we gotta normalize that first
-        if (os.platform() === "win32") {
-            p = p.replace(/^[a-z]:\\/, (c) => c.toUpperCase());
-        }
+        p = normalizeDriveLetter(path.normalize(p));
         // see https://github.com/rust-lang/rust-analyzer/pull/5513#issuecomment-663458818 for why this is needed
-        return path.normalize(p).replace(wsFolder, `\${workspaceFolder${workspaceQualifier}}`);
+        return p.replace(wsFolder, `\${workspaceFolder${workspaceQualifier}}`);
     }
 
     const executable = await getDebugExecutable(
diff --git a/editors/code/src/util.ts b/editors/code/src/util.ts
index 4b3a6970db..723d2388eb 100644
--- a/editors/code/src/util.ts
+++ b/editors/code/src/util.ts
@@ -299,3 +299,26 @@ export async function spawnAsync(
         };
     }
 }
+
+export const isWindows = process.platform === "win32";
+
+export function isWindowsDriveLetter(code: number): boolean {
+    // Copied from https://github.com/microsoft/vscode/blob/02c2dba5f2669b924fd290dff7d2ff3460791996/src/vs/base/common/extpath.ts#L265-L267
+    return code >= /* CharCode.A */ 65 && code <= /* CharCode.Z */ 90 || code >= /* CharCode.a */ 97 && code <= /* CharCode.z */ 122;
+}
+export function hasDriveLetter(path: string, isWindowsOS: boolean = isWindows): boolean {
+    // Copied from https://github.com/microsoft/vscode/blob/02c2dba5f2669b924fd290dff7d2ff3460791996/src/vs/base/common/extpath.ts#L324-L330
+    if (isWindowsOS) {
+        return isWindowsDriveLetter(path.charCodeAt(0)) && path.charCodeAt(1) === /* CharCode.Colon */ 58;
+    }
+
+    return false;
+}
+export function normalizeDriveLetter(path: string, isWindowsOS: boolean = isWindows): string {
+    // Copied from https://github.com/microsoft/vscode/blob/02c2dba5f2669b924fd290dff7d2ff3460791996/src/vs/base/common/labels.ts#L140-L146
+    if (hasDriveLetter(path, isWindowsOS)) {
+        return path.charAt(0).toUpperCase() + path.slice(1);
+    }
+
+    return path;
+}