diff --git a/pkgs/development/nim-packages/preserves/default.nix b/pkgs/development/nim-packages/preserves/default.nix
index 251975bcad6e..d48f7830e71f 100644
--- a/pkgs/development/nim-packages/preserves/default.nix
+++ b/pkgs/development/nim-packages/preserves/default.nix
@@ -1,16 +1,17 @@
-{ lib, stdenv, buildNimPackage, fetchFromGitea, npeg }:
+{ lib, stdenv, buildNimPackage, fetchFromGitea, nim-unwrapped, npeg }:
 
 buildNimPackage rec {
   pname = "preserves";
-  version = "20221102";
+  version = "20230530";
   src = fetchFromGitea {
     domain = "git.syndicate-lang.org";
     owner = "ehmry";
     repo = "${pname}-nim";
     rev = version;
-    hash = "sha256-oRsq1ugtrOvTn23596BXRy71TQZ4h/Vv6JGqBTZdoKY=";
+    hash = "sha256-IRIBGjv4po8VyL873v++ovqz8Vg6a9Qbh/M1fxpQXvY=";
   };
   propagatedBuildInputs = [ npeg ];
+  nimFlags = [ "--path:${nim-unwrapped}/nim" ];
   doCheck = !stdenv.isDarwin;
   meta = src.meta // {
     description = "Nim implementation of the Preserves data language";
diff --git a/pkgs/development/nim-packages/syndicate/default.nix b/pkgs/development/nim-packages/syndicate/default.nix
index b172e5fbdbde..e22455ad9098 100644
--- a/pkgs/development/nim-packages/syndicate/default.nix
+++ b/pkgs/development/nim-packages/syndicate/default.nix
@@ -1,16 +1,16 @@
-{ lib, buildNimPackage, fetchFromGitea, nimSHA2, preserves }:
+{ lib, buildNimPackage, fetchFromGitea, hashlib, preserves }:
 
 buildNimPackage rec {
   pname = "syndicate";
-  version = "20221102";
+  version = "20230530";
   src = fetchFromGitea {
     domain = "git.syndicate-lang.org";
     owner = "ehmry";
     repo = "${pname}-nim";
     rev = version;
-    hash = "sha256-yTPbEsBcpEPXfmhykbWzWdnJ2ExEJxdii1L+mqx8VGQ=";
+    hash = "sha256-lUHoMSQwUlz9EDMvpFL9GlrwbwMvZDILSmuakONwe50=";
   };
-  propagatedBuildInputs = [ nimSHA2 preserves ];
+  propagatedBuildInputs = [ hashlib preserves ];
   meta = src.meta // {
     description = "Nim implementation of the Syndicated Actor model";
     license = lib.licenses.unlicense;