diff --git a/guix.scm b/guix.scm
index 857f216c..8476cde7 100644
--- a/guix.scm
+++ b/guix.scm
@@ -111,10 +111,10 @@ hex2 linker.")
     (license gpl3+)))
 
 (define-public mes
-  (let ((commit "ec072e8625e72b89301ad1746d839c6529188b6f")
+  (let ((commit "06c4857c84474b8106616b438eb0dcee8dd25ad6")
         (revision "0")
         (triplet "i686-unknown-linux-gnu")
-        (version "0.8"))
+        (version "0.9"))
     (package
       (name "mes")
       (version (string-append version "-" revision "." (string-take commit 7)))
@@ -125,7 +125,7 @@ hex2 linker.")
                       (commit commit)))
                 (file-name (string-append name "-" version))
                 (sha256
-                 (base32 "0g9xqqpmj8319hc1931bycj88p16iw50w5rakax3jdj01gr0x6i7"))))
+                 (base32 "0rw3bs8cpyksdccx750ivh394dcyxsr7pp4iyvkgzfwrmdw0yq88"))))
       (build-system gnu-build-system)
       (supported-systems '("i686-linux" "x86_64-linux"))
       (propagated-inputs
@@ -151,7 +151,7 @@ hex2 linker.")
                    (display "Please run
     build-aux/gitlog-to-changelog --srcdir=<git-checkout> > ChangeLog\n")))
                #t))
-           (delete  'strip))))
+           (delete 'strip))))
       (synopsis "Scheme interpreter with C compiler for full source bootstrapping")
       (description
        "Mes [Maxwell Equations of Software] aims to create full source
@@ -162,7 +162,7 @@ Guile-] Scheme interpreter prototype in C and a Nyacc-based C compiler in
       (license gpl3+))))
 
 (define-public mes.git
- (let ((version "0.8")
+ (let ((version "0.9")
         (revision "0")
         (commit (read-string (open-pipe "git show HEAD | head -1 | cut -d ' ' -f 2" OPEN_READ))))
     (package