diff --git a/gnu/packages/virtualization.scm b/gnu/packages/virtualization.scm
index 4a711ee7f..49dee07f5 100644
--- a/gnu/packages/virtualization.scm
+++ b/gnu/packages/virtualization.scm
@@ -192,10 +192,8 @@ server and embedded PowerPC, and S390 guests.")
     (arguments
      (substitute-keyword-arguments (package-arguments qemu)
        ((#:configure-flags _ '(list))
-        `(list
-          ,(string-append
-            "--target-list=i386-softmmu,x86_64-softmmu,mips64el-softmmu"
-            ",arm-softmmu,aarch64-softmmu")))))
+        ;; Restrict to the targets supported by Guix.
+        ''("--target-list=i386-softmmu,x86_64-softmmu,mips64el-softmmu,arm-softmmu,aarch64-softmmu"))))
 
     ;; Remove dependencies on optional libraries, notably GUI libraries.
     (inputs (fold alist-delete (package-inputs qemu)