diff --git a/lib/config-utils.js b/lib/config-utils.js
index a631a457f..3064de01e 100644
--- a/lib/config-utils.js
+++ b/lib/config-utils.js
@@ -51,14 +51,14 @@ class Config {
             const localQueryPath = queryUses.slice(2);
             // Resolve the local path against the workspace so that when this is
             // passed to codeql it resolves to exactly the path we expect it to resolve to.
-            const workspacePath = util.getRequiredEnvParam('GITHUB_WORKSPACE');
-            const absoluteQueryPath = path.join(workspacePath, localQueryPath);
+            const workspacePath = fs.realpathSync(util.getRequiredEnvParam('GITHUB_WORKSPACE'));
+            const absoluteQueryPath = fs.realpathSync(path.join(workspacePath, localQueryPath));
             // Check the file exists
             if (!fs.existsSync(absoluteQueryPath)) {
                 throw new Error(getLocalPathDoesNotExist(configFile, localQueryPath));
             }
             // Check the local path doesn't jump outside the repo using '..' or symlinks
-            if (!(fs.realpathSync(absoluteQueryPath) + path.sep).startsWith(fs.realpathSync(workspacePath) + path.sep)) {
+            if (!(absoluteQueryPath + path.sep).startsWith(workspacePath + path.sep)) {
                 throw new Error(getLocalPathOutsideOfRepository(configFile, localQueryPath));
             }
             this.additionalQueries.push(absoluteQueryPath);
diff --git a/lib/config-utils.js.map b/lib/config-utils.js.map
index 2f02b995d..7c954b2b0 100644
--- a/lib/config-utils.js.map
+++ b/lib/config-utils.js.map
@@ -1 +1 @@
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\ No newline at end of file
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\ No newline at end of file
diff --git a/src/config-utils.ts b/src/config-utils.ts
index 8a3d18e9b..cedf75c2f 100644
--- a/src/config-utils.ts
+++ b/src/config-utils.ts
@@ -51,8 +51,8 @@ export class Config {
             const localQueryPath = queryUses.slice(2);
             // Resolve the local path against the workspace so that when this is
             // passed to codeql it resolves to exactly the path we expect it to resolve to.
-            const workspacePath = util.getRequiredEnvParam('GITHUB_WORKSPACE');
-            const absoluteQueryPath = path.join(workspacePath, localQueryPath);
+            const workspacePath = fs.realpathSync(util.getRequiredEnvParam('GITHUB_WORKSPACE'));
+            const absoluteQueryPath = fs.realpathSync(path.join(workspacePath, localQueryPath));
 
             // Check the file exists
             if (!fs.existsSync(absoluteQueryPath)) {
@@ -60,7 +60,7 @@ export class Config {
             }
 
             // Check the local path doesn't jump outside the repo using '..' or symlinks
-            if (!(fs.realpathSync(absoluteQueryPath) + path.sep).startsWith(fs.realpathSync(workspacePath) + path.sep)) {
+            if (!(absoluteQueryPath + path.sep).startsWith(workspacePath + path.sep)) {
                 throw new Error(getLocalPathOutsideOfRepository(configFile, localQueryPath));
             }