diff --git a/tools/osv-linter/internal/pkgchecker/ecosystems.go b/tools/osv-linter/internal/pkgchecker/ecosystems.go
index 9ad81a8..14a3491 100644
--- a/tools/osv-linter/internal/pkgchecker/ecosystems.go
+++ b/tools/osv-linter/internal/pkgchecker/ecosystems.go
@@ -145,7 +145,7 @@ func VersionsExistInEcosystem(pkg string, versions []string, ecosystem string) e
 	case "GSD":
 		return nil
 	case "Hackage":
-		return nil
+		return versionsExistInHackage(pkg, versions)
 	case "Hex":
 		return nil
 	case "Linux":
diff --git a/tools/osv-linter/internal/pkgchecker/ecosystems_test.go b/tools/osv-linter/internal/pkgchecker/ecosystems_test.go
index a7abcb1..64b8c97 100644
--- a/tools/osv-linter/internal/pkgchecker/ecosystems_test.go
+++ b/tools/osv-linter/internal/pkgchecker/ecosystems_test.go
@@ -102,6 +102,70 @@ func Test_versionsExistInGo(t *testing.T) {
 	}
 }
 
+func Test_versionsExistInHackage(t *testing.T) {
+	t.Parallel()
+
+	type args struct {
+		pkg      string
+		versions []string
+	}
+	tests := []struct {
+		name    string
+		args    args
+		wantErr bool
+	}{
+		{
+			name: "multiple_versions_which_all_exist",
+			args: args{
+				pkg:      "aeson",
+				versions: []string{"0.1.0.0", "1.4.7.1", "2.2.2.0"},
+			},
+			wantErr: false,
+		},
+		{
+			name: "multiple_versions_with_one_that_does_not_exist",
+			args: args{
+				pkg:      "aeson",
+				versions: []string{"1.1", "2.0.0-beta1", "3.1.5", "2.2.2.2"},
+			},
+			wantErr: true,
+		},
+		{
+			name: "an_invalid_version",
+			args: args{
+				pkg:      "aeson",
+				versions: []string{"!"},
+			},
+			wantErr: true,
+		},
+		{
+			name: "an_invalid_package",
+			args: args{
+				pkg:      "!",
+				versions: []string{"1.0.0"},
+			},
+			wantErr: true,
+		},
+		{
+			name: "a_package_that_does_not_exit",
+			args: args{
+				pkg:      "not-a-real-package-hopefully",
+				versions: []string{"1.0.0"},
+			},
+			wantErr: true,
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			t.Parallel()
+
+			if err := versionsExistInHackage(tt.args.pkg, tt.args.versions); (err != nil) != tt.wantErr {
+				t.Errorf("versionsExistInHackage() error = %v, wantErr %v", err, tt.wantErr)
+			}
+		})
+	}
+}
+
 func Test_versionsExistInNpm(t *testing.T) {
 	t.Parallel()
 
diff --git a/tools/osv-linter/internal/pkgchecker/version_check.go b/tools/osv-linter/internal/pkgchecker/version_check.go
index 6852e82..3167847 100644
--- a/tools/osv-linter/internal/pkgchecker/version_check.go
+++ b/tools/osv-linter/internal/pkgchecker/version_check.go
@@ -188,6 +188,18 @@ func goVersionsExist(versions []string) error {
 	return nil
 }
 
+// Confirm that all specified versions of a package exist in Hackage.
+func versionsExistInHackage(pkg string, versions []string) error {
+	packageInstanceURL := fmt.Sprintf("%s/%s.json", EcosystemBaseURLs["Hackage"], pkg)
+
+	return versionsExistInGeneric(
+		pkg, versions,
+		"Hackage",
+		packageInstanceURL,
+		"@keys",
+	)
+}
+
 // Confirm that all specified versions of a package exist in npm.
 func versionsExistInNpm(pkg string, versions []string) error {
 	packageInstanceURL := fmt.Sprintf("%s/%s", EcosystemBaseURLs["npm"], pkg)