diff --git a/.gitmodules b/.gitmodules
index 984153e..a2bc113 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -208,3 +208,6 @@
 [submodule "nimble/nimble"]
 	path = nimble/nimble
 	url = https://github.com/nim-lang/nimble.git
+[submodule "hottext"]
+	path = hottext
+	url = https://git.sr.ht/~ehmry/hottext
diff --git a/Tuprules.tup b/Tuprules.tup
index d6f21c8..7029f5b 100644
--- a/Tuprules.tup
+++ b/Tuprules.tup
@@ -13,7 +13,7 @@ NIM_FLAGS = --noNimblePath
 
 !nim = | $(NIM_GROUPS) |> ^o nim compile %f^ $(DIRENV) $(NIM) compile $(NIM_FLAGS) $(NIM_FLAGS_%B) -o:%o %f |> %B
 !nim_run = | $(NIM_GROUPS) |> ^o nim run %f^ $(DIRENV) $(NIM) compile $(NIM_FLAGS) $(NIM_FLAGS_%B) -o:%o -r %f |> %B.run
-!nim_bin = | $(NIM_GROUPS) |> ^ nim bin %f^ $(DIRENV) $(NIM) compile $(NIM_FLAGS) $(NIM_FLAGS_%B) -o:%o %f |> $(BIN_DIR)/%B
+!nim_bin = | $(NIM_GROUPS) |> ^o nim bin %f^ $(DIRENV) $(NIM) compile $(NIM_FLAGS) $(NIM_FLAGS_%B) -o:%o %f |> $(BIN_DIR)/%B
 !nim_check = | $(NIM_GROUPS) |> ^ nim doc %f^ $(DIRENV) $(NIM) doc $(NIM_FLAGS) $(NIM_FLAGS_%B) -o:%o %f |> %B.html
 
 !symlink = |> ln -s %f %o |>
@@ -23,3 +23,9 @@ NIM_FLAGS = --noNimblePath
 
 SYNDICATE_CONFIG_DIR = $(TUP_CWD)/config
 !assert_built = |> ^ <built %b …>^ echo "<built %b \"`realpath %f`\" \"`b2sum -l 32 %f | { read sum rest ; echo $sum; }`\">" > %o |> $(SYNDICATE_CONFIG_DIR)/built/%b.pr
+
+!nim_check = | $(NIM_GROUPS) |> ^ nim doc %f^ $(DIRENV) $(NIM) doc $(NIM_FLAGS) $(NIM_FLAGS_%B) -o:%o %f |> %B.html
+!nim_lk = | $(BIN_DIR)/<nim_lk> |> ^o nim_lk^ $(BIN_DIR)/nim_lk > %o |> lock.json
+
+NIXEXPRS_DIR = $(TUP_CWD)/nixexprs
+!nim_cfg = |> ^o nix build nim.cfg^ nix build --file $(NIXEXPRS_DIR)/configure.nix --argstr lockPath `pwd`/%f --out-link %o |> nim.cfg
diff --git a/hottext b/hottext
new file mode 160000
index 0000000..4fd7e9a
--- /dev/null
+++ b/hottext
@@ -0,0 +1 @@
+Subproject commit 4fd7e9a43458c8358e6c81ce3385732d42562168
diff --git a/nixexprs/configure.nix b/nixexprs/configure.nix
new file mode 100644
index 0000000..fa79147
--- /dev/null
+++ b/nixexprs/configure.nix
@@ -0,0 +1,10 @@
+{ pkgs ? import <nixpkgs> { }, lockPath }:
+let inherit (pkgs) lib;
+in lib.pipe lockPath [
+  builtins.readFile
+  builtins.fromJSON
+  (builtins.getAttr "depends")
+  (map ({ path, srcDir, ... }: ''path:"${path}/${srcDir}"''))
+  lib.strings.concatLines
+  (pkgs.writeText "nim.cfg")
+]