diff --git a/dist/setup/index.js b/dist/setup/index.js
index f1e3e297..8cba259c 100644
--- a/dist/setup/index.js
+++ b/dist/setup/index.js
@@ -91086,13 +91086,9 @@ function useCpythonVersion(version, architecture, updateEnvironment, checkLatest
             core.exportVariable('Python3_ROOT_DIR', installDir);
             core.exportVariable('PKG_CONFIG_PATH', installDir + '/lib/pkgconfig');
             if (utils_1.IS_LINUX) {
-                const libPath = process.env.LD_LIBRARY_PATH
-                    ? `:${process.env.LD_LIBRARY_PATH}`
-                    : '';
                 const pyLibPath = path.join(installDir, 'lib');
-                if (!libPath.split(':').includes(pyLibPath)) {
-                    core.exportVariable('LD_LIBRARY_PATH', pyLibPath + libPath);
-                }
+                ensurePathInEnvVar('LIBRARY_PATH', pyLibPath);
+                ensurePathInEnvVar('LD_LIBRARY_PATH', pyLibPath);
             }
             core.addPath(installDir);
             core.addPath(_binDir);
@@ -91115,6 +91111,15 @@ function useCpythonVersion(version, architecture, updateEnvironment, checkLatest
     });
 }
 exports.useCpythonVersion = useCpythonVersion;
+/** Ensure a folder is present in a colon-separated env-var */
+function ensurePathInEnvVar(envVarName, extraPath) {
+    const currentPath = process.env[envVarName]
+        ? `:${process.env[envVarName]}`
+        : '';
+    if (!currentPath.split(':').includes(extraPath)) {
+        core.exportVariable(envVarName, extraPath + currentPath);
+    }
+}
 /** Convert versions like `3.8-dev` to a version like `~3.8.0-0`. */
 function desugarDevVersion(versionSpec) {
     const devVersion = /^(\d+)\.(\d+)-dev$/;
diff --git a/src/find-python.ts b/src/find-python.ts
index 77278770..e5bc7265 100644
--- a/src/find-python.ts
+++ b/src/find-python.ts
@@ -121,15 +121,11 @@ export async function useCpythonVersion(
     core.exportVariable('PKG_CONFIG_PATH', installDir + '/lib/pkgconfig');
 
     if (IS_LINUX) {
-      const libPath = process.env.LD_LIBRARY_PATH
-        ? `:${process.env.LD_LIBRARY_PATH}`
-        : '';
       const pyLibPath = path.join(installDir, 'lib');
-
-      if (!libPath.split(':').includes(pyLibPath)) {
-        core.exportVariable('LD_LIBRARY_PATH', pyLibPath + libPath);
-      }
+      ensurePathInEnvVar('LIBRARY_PATH', pyLibPath);
+      ensurePathInEnvVar('LD_LIBRARY_PATH', pyLibPath);
     }
+
     core.addPath(installDir);
     core.addPath(_binDir);
 
@@ -159,6 +155,17 @@ export async function useCpythonVersion(
   return {impl: 'CPython', version: installed};
 }
 
+/** Ensure a folder is present in a colon-separated env-var */
+function ensurePathInEnvVar(envVarName: string, extraPath: string) {
+  const currentPath = process.env[envVarName]
+    ? `:${process.env[envVarName]}`
+    : '';
+
+  if (!currentPath.split(':').includes(extraPath)) {
+    core.exportVariable(envVarName, extraPath + currentPath);
+  }
+}
+
 /** Convert versions like `3.8-dev` to a version like `~3.8.0-0`. */
 function desugarDevVersion(versionSpec: string) {
   const devVersion = /^(\d+)\.(\d+)-dev$/;