diff --git a/deps.nix b/deps.nix
index bcfd3f4..54ccab6 100644
--- a/deps.nix
+++ b/deps.nix
@@ -60,8 +60,8 @@ let repos = [
       inherit repos;
       artifactId = "clojure";
       groupId = "org.clojure";
-      sha512 = "1925300a0fe4cc9fc3985910bb04ae65a19ce274dacc5ec76e708cfa87a7952a0a77282b083d0aebb2206afff619af73a57f0d661a3423601586f0829cc7956b";
-      version = "1.11.1";
+      sha512 = "4bb567b9262d998f554f44e677a8628b96e919bc8bcfb28ab2e80d9810f8adf8f13a8898142425d92f3515e58c57b16782cff12ba1b5ffb38b7d0ccd13d99bbc";
+      version = "1.10.3";
       
     };
     paths = [ src ];
@@ -177,8 +177,8 @@ let repos = [
       inherit repos;
       artifactId = "core.specs.alpha";
       groupId = "org.clojure";
-      sha512 = "f521f95b362a47bb35f7c85528c34537f905fb3dd24f2284201e445635a0df701b35d8419d53c6507cc78d3717c1f83cda35ea4c82abd8943cd2ab3de3fcad70";
-      version = "0.2.62";
+      sha512 = "c1d2a740963896d97cd6b9a8c3dcdcc84459ea66b44170c05b8923e5fbb731b4b292b217ed3447bbc9e744c9a496552f77a6c38aea232e5e69f8faa627dea4b5";
+      version = "0.2.56";
       
     };
     paths = [ src ];
@@ -203,8 +203,8 @@ let repos = [
       inherit repos;
       artifactId = "spec.alpha";
       groupId = "org.clojure";
-      sha512 = "ddfe4fa84622abd8ac56e2aa565a56e6bdc0bf330f377ff3e269ddc241bb9dbcac332c13502dfd4c09c2c08fe24d8d2e8cf3d04a1bc819ca5657b4e41feaa7c2";
-      version = "0.3.218";
+      sha512 = "0740dc3a755530f52e32d27139a9ebfd7cbdb8d4351c820de8d510fe2d52a98acd6e4dfc004566ede3d426e52ec98accdca1156965218f269e60dd1cd4242a73";
+      version = "0.2.194";
       
     };
     paths = [ src ];
@@ -398,8 +398,8 @@ let repos = [
       inherit repos;
       artifactId = "tools.namespace";
       groupId = "org.clojure";
-      sha512 = "4430c0d6f3974428cf99b51cd3d4ae6724401ef52257398f435dafd86dcc4294b706412f0abf9c8ac1d99eb8ab29b599210f2588df3f98ecef73651ca3088754";
-      version = "1.3.0";
+      sha512 = "8d3b51778c09f69385eaffb9d288f53cf88310210fff9360211ef8f340dace698be0b235e28c6a953033f8b8471665033f9004382ddeecd0d30cd80ecea52da1";
+      version = "1.2.0";
       
     };
     paths = [ src ];
@@ -554,8 +554,8 @@ let repos = [
       inherit repos;
       artifactId = "tools.deps.alpha";
       groupId = "org.clojure";
-      sha512 = "2d2ec18ed48960e1c3cec7ccc4991c16944a5c4ef734f8651449fdf7af1adfbacb113f13df16103a2404bf8fc5b2690e2d6925adbb24e136ffce82cb6cba71e9";
-      version = "0.14.1178";
+      sha512 = "3ec10e6220ef256b23b24a0400315b184e28abe0e1ade0a48717805cccfb4ac487ea4778e0317301047a44f47bf66ddaca484a190a72d7eee6c620b23f1dab36";
+      version = "0.12.1148";
       
     };
     paths = [ src ];
diff --git a/flake.nix b/flake.nix
index cdac546..d94c3a6 100644
--- a/flake.nix
+++ b/flake.nix
@@ -6,7 +6,7 @@
     utils.url = "github:numtide/flake-utils";
     clj2nix.url = "github:hlolli/clj2nix";
     build-tools-src = {
-      url = "github:clojure/tools.build?tag=v0.8.2";
+      url = "github:clojure/tools.build?tag=v0.7.7";
       flake = false;
     };
     gitignore = {
@@ -28,5 +28,7 @@
         mkClojureLib =
           pkgs.callPackage ./mkClojureLib.nix { inherit build-tools-jar; };
       };
+      devShell."${system}" =
+        pkgs.mkShell { buildInputs = with pkgs; [ clojure clj2nix ]; };
     };
 }