github: Make the clean commands work

magefile.go

@@ -4,6 +4,7 @@ package main
 
 import (
 	"bytes"
+	"cmp"
 	"fmt"
 	"os"
 	"path"
@@ -154,9 +155,6 @@ func Check() {
 	// don't run two tests in parallel, they saturate the CPUs anyway, and running two
 	// causes memory issues in CI.
 	mg.Deps(TestRace)
-	if isCI() {
-		mg.Deps(CleanTest, UninstallAll)
-	}
 }
 
 func testGoFlags() string {
@@ -196,10 +194,12 @@ func TestRace() error {
 			return err
 		}
 		for _, pkg := range pkgs {
+			if err := cmp.Or(CleanTest(), UninstallAll()); err != nil {
+				return err
+			}
 			if err := runCmd(env, goexe, "test", "-p", "2", "-race", pkg, "-tags", buildTags()); err != nil {
 				return err
 			}
-			mg.Deps(CleanTest, UninstallAll)
 		}
 		return nil