diff --git a/guix-data-service/model/derivation.scm b/guix-data-service/model/derivation.scm
index 3c5d0fb..f09435e 100644
--- a/guix-data-service/model/derivation.scm
+++ b/guix-data-service/model/derivation.scm
@@ -64,9 +64,13 @@
 (define (valid-targets conn)
   '("arm-linux-gnueabihf"
     "aarch64-linux-gnu"
+    "mips64el-linux-gnu"
     "powerpc-linux-gnu"
+    "powerpc64le-linux-gnu"
     "riscv64-linux-gnu"
-    "i586-pc-gnu"))
+    "i586-pc-gnu"
+    "i686-w64-mingw32"
+    "x86_64-w64-mingw32"))
 
 (define (count-derivations conn)
   (first