diff --git a/zilti/packages/chicken.scm b/zilti/packages/chicken.scm
index d3b52c3..1ea7a2f 100644
--- a/zilti/packages/chicken.scm
+++ b/zilti/packages/chicken.scm
@@ -441,20 +441,22 @@ language standard, and includes many enhancements and extensions.")
   chicken-tree-walkers
   (package
     (name "chicken-tree-walkers")
-    (version "1.0")
+    (version "2.0")
     (source
       (origin
         (method url-fetch)
-        (uri (egg-uri "tree-walkers" "1.0"))
+        (uri (egg-uri "tree-walkers" "2.0"))
         (sha256
-          (base32 "1if8njjaac4i23126jlmzw67y7hcr2hs842nwsgyzi2hi780pzvk"))))
+          (base32 "0zsgrw8sxg3fc8z42ghjh47jq2ycwsmsgdw3kn7fbhvypz4yrmfy"))))
     (propagated-inputs (specifications->packages (list)))
     (native-inputs (specifications->packages (list "chicken-simple-tests")))
     (build-system chicken-build-system)
     (arguments '(#:egg-name "tree-walkers"))
-    (synopsis "replacement of car, cdr and consorts")
+    (synopsis
+      "replacement of car, cdr and consorts and other tree- and\nlist-routines")
     (home-page "https://wiki.call-cc.org/eggref/5/tree-walkers")
-    (description "replacement of car, cdr and consorts")
+    (description
+      "replacement of car, cdr and consorts and other tree- and\nlist-routines")
     (license license:bsd-2)))
 
 (define-public
@@ -2746,6 +2748,27 @@ language standard, and includes many enhancements and extensions.")
     (description "Creating algebraic- and abstract-types based on vectors")
     (license license:bsd-2)))
 
+(define-public
+  chicken-prefixes
+  (package
+    (name "chicken-prefixes")
+    (version "1.0")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (egg-uri "prefixes" "1.0"))
+        (sha256
+          (base32 "09xy34vz2w9ngi9z2yahv3fw5xiiy4xpdmf33zfvj46k7w5dahpn"))))
+    (propagated-inputs
+      (specifications->packages (list "chicken-tree-walkers")))
+    (native-inputs (specifications->packages (list "chicken-simple-tests")))
+    (build-system chicken-build-system)
+    (arguments '(#:egg-name "prefixes"))
+    (synopsis "prefixing in er-macro-transformers made easy")
+    (home-page "https://wiki.call-cc.org/eggref/5/prefixes")
+    (description "prefixing in er-macro-transformers made easy")
+    (license license:bsd-2)))
+
 (define-public
   chicken-define-er-syntax
   (package
@@ -10707,13 +10730,13 @@ language standard, and includes many enhancements and extensions.")
   chicken-toml
   (package
     (name "chicken-toml")
-    (version "0.7")
+    (version "0.8")
     (source
       (origin
         (method url-fetch)
-        (uri (egg-uri "toml" "0.7"))
+        (uri (egg-uri "toml" "0.8"))
         (sha256
-          (base32 "10isk4rxcjabm16g59nxafm2vx0vidjq1alaxbih3gw9w2kc11l4"))))
+          (base32 "0235ihy5y34m5nw1n75y84hs9icjls77w99c000ysm6ahlhqmq0x"))))
     (propagated-inputs
       (specifications->packages
         (list "chicken-r7rs" "chicken-rfc3339" "chicken-coops")))
@@ -10861,13 +10884,13 @@ language standard, and includes many enhancements and extensions.")
   chicken-apropos
   (package
     (name "chicken-apropos")
-    (version "3.9.1")
+    (version "3.10.1")
     (source
       (origin
         (method url-fetch)
-        (uri (egg-uri "apropos" "3.9.1"))
+        (uri (egg-uri "apropos" "3.10.1"))
         (sha256
-          (base32 "1ph7d53mz0fd76lyqikzqh06r02f5q6vxmj2s902pf2i9yrjsa0p"))))
+          (base32 "1aciq2kbqnczhr1k8rcc7g39slb12ndwvnzs1y2ynk33wcvllnna"))))
     (propagated-inputs
       (specifications->packages
         (list "chicken-srfi-1"
@@ -11272,13 +11295,13 @@ language standard, and includes many enhancements and extensions.")
   chicken-redis
   (package
     (name "chicken-redis")
-    (version "0.5")
+    (version "0.6")
     (source
       (origin
         (method url-fetch)
-        (uri (egg-uri "redis" "0.5"))
+        (uri (egg-uri "redis" "0.6"))
         (sha256
-          (base32 "1z8pr6dgz652h14zn1vkdm3av48lifk4vf7jzacrq0f0k14i5bc2"))))
+          (base32 "1p3q9216y0ddnghcy83h3xm0vi2qg17kv1v1xff2sfz4mzliy6qf"))))
     (propagated-inputs
       (specifications->packages
         (list "chicken-r7rs"