diff --git a/dist/setup/index.js b/dist/setup/index.js
index 1e281a8..4afa92b 100644
--- a/dist/setup/index.js
+++ b/dist/setup/index.js
@@ -52374,6 +52374,7 @@ function findPyPyVersion(versionSpec, architecture) {
         const _binDir = path.join(installDir, pipDir);
         const pythonLocation = pypyInstall.getPyPyBinaryPath(installDir);
         core.exportVariable('pythonLocation', pythonLocation);
+        core.exportVariable('PKG_CONFIG_PATH', pythonLocation + '/lib/pkgconfig');
         core.addPath(pythonLocation);
         core.addPath(_binDir);
         core.setOutput('python-version', 'pypy' + resolvedPyPyVersion.trim());
@@ -57009,6 +57010,7 @@ function useCpythonVersion(version, architecture) {
             ].join(os.EOL));
         }
         core.exportVariable('pythonLocation', 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}`
diff --git a/src/find-pypy.ts b/src/find-pypy.ts
index 75b6abb..fd27382 100644
--- a/src/find-pypy.ts
+++ b/src/find-pypy.ts
@@ -50,6 +50,7 @@ export async function findPyPyVersion(
   const _binDir = path.join(installDir, pipDir);
   const pythonLocation = pypyInstall.getPyPyBinaryPath(installDir);
   core.exportVariable('pythonLocation', pythonLocation);
+  core.exportVariable('PKG_CONFIG_PATH', pythonLocation + '/lib/pkgconfig');
   core.addPath(pythonLocation);
   core.addPath(_binDir);
   core.setOutput('python-version', 'pypy' + resolvedPyPyVersion.trim());
diff --git a/src/find-python.ts b/src/find-python.ts
index b8175a4..3959ecf 100644
--- a/src/find-python.ts
+++ b/src/find-python.ts
@@ -70,6 +70,7 @@ export async function useCpythonVersion(
   }
 
   core.exportVariable('pythonLocation', installDir);
+  core.exportVariable('PKG_CONFIG_PATH', installDir + '/lib/pkgconfig');
 
   if (IS_LINUX) {
     const libPath = process.env.LD_LIBRARY_PATH