diff --git a/phpmon-tests/Parsers/NginxConfigParserTest.swift b/phpmon-tests/Parsers/NginxConfigParserTest.swift
index 8d31048..096673d 100644
--- a/phpmon-tests/Parsers/NginxConfigParserTest.swift
+++ b/phpmon-tests/Parsers/NginxConfigParserTest.swift
@@ -20,12 +20,12 @@ class NginxConfigParserTest: XCTestCase {
     
     func testCanDetermineIsolation() throws {
         XCTAssertNil(
-            NginxConfigParser(filePath: NginxConfigParserTest.regularUrl.path).isolatedVersion()
+            NginxConfigParser(filePath: NginxConfigParserTest.regularUrl.path).isolatedVersion
         )
         
         XCTAssertEqual(
             "8.1",
-            NginxConfigParser(filePath: NginxConfigParserTest.isolatedUrl.path).isolatedVersion()
+            NginxConfigParser(filePath: NginxConfigParserTest.isolatedUrl.path).isolatedVersion
         )
     }
     
diff --git a/phpmon/Domain/Integrations/Valet/NginxConfigParser.swift b/phpmon/Domain/Integrations/Valet/NginxConfigParser.swift
index 0756a65..db17bfe 100644
--- a/phpmon/Domain/Integrations/Valet/NginxConfigParser.swift
+++ b/phpmon/Domain/Integrations/Valet/NginxConfigParser.swift
@@ -16,7 +16,7 @@ class NginxConfigParser {
         self.contents = try! String(contentsOfFile: filePath)
     }
         
-    public func isolatedVersion() -> String? {
+    lazy var isolatedVersion: String? = {
         let regex = try! NSRegularExpression(
             pattern: #"(ISOLATED_PHP_VERSION=(php@)?)((?<major>\d)(.)?(?<minor>\d))"#,
             options: []
@@ -35,5 +35,5 @@ class NginxConfigParser {
         let minor: String = contents[minorRange]
         
         return "\(major).\(minor)"
-    }
+    }()
 }
diff --git a/phpmon/Domain/Integrations/Valet/ValetSite.swift b/phpmon/Domain/Integrations/Valet/ValetSite.swift
index c17cd9b..ba8adc6 100644
--- a/phpmon/Domain/Integrations/Valet/ValetSite.swift
+++ b/phpmon/Domain/Integrations/Valet/ValetSite.swift
@@ -89,8 +89,6 @@ class ValetSite {
     public func determineIsolated() {
         if let version = ValetSite.isolatedVersion("~/.config/valet/Nginx/\(self.name).\(self.tld)") {
             self.isolatedPhpVersion = PhpEnv.shared.cachedPhpInstallations[version]
-        } else {
-            self.isolatedPhpVersion = nil
         }
     }
     
@@ -205,7 +203,9 @@ class ValetSite {
     
     public static func isolatedVersion(_ filePath: String) -> String? {
         if Filesystem.fileExists(filePath) {
-            return NginxConfigParser.init(filePath: filePath).isolatedVersion()
+            return NginxConfigParser
+                .init(filePath: filePath)
+                .isolatedVersion
         }
         
         return nil