diff --git a/.envrc b/.envrc
index ec45672..1d953f4 100644
--- a/.envrc
+++ b/.envrc
@@ -1,2 +1 @@
 use nix
-PATH_add ./node_modules/.bin
diff --git a/.gitignore b/.gitignore
index 25a53fc..914d288 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,6 +1,8 @@
 /.cache
+/.ninja*
 /data
 /dist
+/index.js
 /log.txt
 /node_modules
 elm-stuff
diff --git a/build.ninja b/build.ninja
new file mode 100644
index 0000000..07a8952
--- /dev/null
+++ b/build.ninja
@@ -0,0 +1,6 @@
+elmFlags=--debug
+
+rule elm
+  command = elm make $elmFlags --output=$out $in
+
+build index.js: elm src/Main.elm | elm.json src/Database/ID.elm src/Main.elm src/Selection.elm src/Database.elm src/Search.elm src/Html/Styled/Events/Extra.elm src/Content.elm src/Node.elm src/Route.elm src/Widgets/Colors.elm src/Widgets/Icons.elm src/Widgets/TimeDifference.elm src/Widgets/Text.elm src/Widgets/Button.elm 
diff --git a/script/build.sh b/script/build.sh
new file mode 100755
index 0000000..e4068e1
--- /dev/null
+++ b/script/build.sh
@@ -0,0 +1,15 @@
+#!/usr/bin/env bash
+set -eou pipefail
+
+ELM_FILES="$(find src -name '*.elm')"
+
+cat > build.ninja <<EOF
+elmFlags=--debug
+
+rule elm
+  command = elm make \$elmFlags --output=\$out \$in
+
+build index.js: elm src/Main.elm | elm.json $(echo "$ELM_FILES" | tr '\n' ' ')
+EOF
+
+ninja "$@"
diff --git a/script/resolve-elm-import.sh b/script/resolve-elm-import.sh
deleted file mode 100755
index 0547827..0000000
--- a/script/resolve-elm-import.sh
+++ /dev/null
@@ -1,36 +0,0 @@
-#!/usr/bin/env sh
-set -euo pipefail
-
-ELM_JSON="${1:-}"
-NAME="${2:-}"
-if test -z "$NAME"; then
-    echo "usage: $0 elm.json Name.Of.Module"
-    exit 1
-fi
-
-RELATIVE_PATH="$(echo $NAME | sed 's|\.|/|g').elm"
-
-# look locally
-
-for DIR in $(jq -r '.["source-directories"] | join(" ")' "$ELM_JSON"); do
-    FINAL="$DIR/$RELATIVE_PATH"
-    if test -f $FINAL; then
-        echo "$FINAL"
-        exit 0
-    fi
-done
-
-# look in elm-stuff
-
-ELM_HOME="${ELM_HOME:-$HOME/.elm}"
-ELM_VERSION="$(jq -r '.["elm-version"]' "$ELM_JSON")"
-
-for PROJECT_VERSION_SRC in $(jq -r '.dependencies.direct | to_entries | map("\(.key)/\(.value)") | join(" ")' "$ELM_JSON"); do
-    FINAL="$ELM_HOME/$ELM_VERSION/packages/$PROJECT_VERSION_SRC/src/$RELATIVE_PATH"
-    if test -f $FINAL; then
-        echo "$FINAL"
-        exit 0
-    fi
-done
-
-exit 1
diff --git a/shell.nix b/shell.nix
index f9385f6..44442aa 100644
--- a/shell.nix
+++ b/shell.nix
@@ -13,8 +13,14 @@ stdenv.mkDerivation {
     niv.niv
     git
 
+    # elm
+    elmPackages.elm
+    elmPackages.elm-format
+    elmPackages.elm-test
+    # elmPackages.elm-json
+    # elmPackages.elm-review
+
     # building
-    nodejs-12_x
-    nodePackages.npm
+    ninja
   ] ++ lib.optionals stdenv.isDarwin darwinDeps;
 }