diff --git a/build.zig b/build.zig
index 67ebd2b..58a4808 100644
--- a/build.zig
+++ b/build.zig
@@ -57,8 +57,8 @@ pub fn build(b: *std.Build) !void {
     exe_options.addOption(usize, "src_file_trimlen", std.fs.path.dirname(std.fs.path.dirname(@src().file).?).?.len);
     exe_options.addOption(bool, "enable_debug_extensions", enable_debug_extensions);
     exe_options.addOption(bool, "build_debug", enable_debug);
-    exe_options.addOption([]const u8, "lib_path", "../python/Lib");
     exe.root_module.addOptions("options", exe_options);
+    exe_options.addOption([]const u8, "lib_path", b.fmt("{s}/python/Lib", .{b.install_path}));
 
     const tracer_dep = b.dependency("tracer", .{ .optimize = optimize, .target = target });
     const libgc_dep = b.dependency("libgc", .{ .optimize = optimize, .target = target });
diff --git a/src/frontend/Python.zig b/src/frontend/Python.zig
index 8d1954f..b5eefd7 100644
--- a/src/frontend/Python.zig
+++ b/src/frontend/Python.zig
@@ -87,7 +87,7 @@ pub fn Initialize(
     _ = externs.PyConfig_Read(&config);
 
     const utf32_path = try utf8ToUtf32Z(
-        "/home/dr/Zython/osmium/zig-out/python/Lib",
+        build_options.lib_path,
         allocator,
     );
 
diff --git a/tests/cases.zig b/tests/cases.zig
index afac6b2..a2f8cb6 100644
--- a/tests/cases.zig
+++ b/tests/cases.zig
@@ -33,7 +33,7 @@ pub fn addCases(
     for (test_dirs) |dir| {
         const files = try getPyFilesInDir(b, b.fmt("tests/{s}", .{dir}), b.allocator);
         for (files) |file| {
-            parent_step.dependOn(addCase(b, target, file, osmium, python, compare_tool));
+            parent_step.dependOn(addCase(b, file, osmium, python, compare_tool));
         }
     }
 }