diff --git a/.mise/tasks/build.ts b/.mise/tasks/build.ts
index 3cbd09de9..e52ab01f0 100755
--- a/.mise/tasks/build.ts
+++ b/.mise/tasks/build.ts
@@ -1,7 +1,31 @@
 #!/usr/bin/env bun
-//MISE description="Run all build tasks"
-//MISE depends=["build:check-elm-docs", "build:cli", "build:cli2", "build:treeview", "build:morphir-ts", "build:dev-server", "build:components", "build:try-morphir"]
+//MISE description="Run all build tasks (orchestrates elm work serially to avoid Windows races)"
 
-import { log } from "./_lib.ts";
+import { exec, log, ROOT_DIR } from "./_lib.ts";
+
+// elm make is not concurrent-write-safe on Windows: multiple processes race on
+// ~/.elm/<package>/artifacts.dat and per-project elm-stuff/, producing
+// "PROBLEM BUILDING DEPENDENCIES" failures. Most build tasks here invoke elm
+// directly (build:cli, build:cli2, build:dev-server, build:try-morphir,
+// build:check-elm-docs) or indirectly via node-elm-compiler in cli/morphir-elm.js
+// (build:morphir-ts), so we run everything serially.
+//
+// mise reads `//MISE depends=` headers but its scheduler parallelizes any tasks
+// whose deps are satisfied rather than enforcing strict ordering, so we orchestrate
+// explicitly here. `--skip-deps` prevents the subtasks from re-running their own
+// declared deps (which would otherwise repeatedly trigger build:cli, etc.). The
+// `sources` and `outputs` declarations on each subtask let mise skip re-running
+// a task whose inputs haven't changed.
+const run = (task: string) =>
+  exec("mise", ["run", "--skip-deps", task], { cwd: ROOT_DIR });
+
+await run("build:check-elm-docs");
+await run("build:cli");
+await run("build:cli2");
+await run("build:dev-server");
+await run("build:try-morphir");
+await run("build:components"); // concat: depends on dev-server output
+await run("build:morphir-ts"); // invokes elm via cli/morphir-elm.js
+await run("build:treeview"); // webpack only, no elm
 
 log("build", "All build tasks completed");
diff --git a/.mise/tasks/build/check-elm-docs.ts b/.mise/tasks/build/check-elm-docs.ts
index cfefcb95d..8db82d423 100755
--- a/.mise/tasks/build/check-elm-docs.ts
+++ b/.mise/tasks/build/check-elm-docs.ts
@@ -1,5 +1,7 @@
 #!/usr/bin/env bun
 //MISE description="Check Elm documentation compiles"
+//MISE sources=["src/**/*.elm", "elm.json"]
+//MISE outputs=["docs.json"]
 
 import { elmMake, log } from "../_lib.ts";
 
diff --git a/.mise/tasks/build/cli.ts b/.mise/tasks/build/cli.ts
index 0598d296d..303b12a82 100755
--- a/.mise/tasks/build/cli.ts
+++ b/.mise/tasks/build/cli.ts
@@ -1,6 +1,8 @@
 #!/usr/bin/env bun
 //MISE description="Build CLI (Elm compilation)"
 //MISE depends=["build:check-elm-docs"]
+//MISE sources=["src/**/*.elm", "cli/src/**/*.elm", "cli/elm.json"]
+//MISE outputs=["cli/Morphir.Elm.CLI.js", "cli/Morphir.Elm.DevCLI.js"]
 
 import { elmMake, log, PATHS } from "../_lib.ts";
 
diff --git a/.mise/tasks/build/cli2.ts b/.mise/tasks/build/cli2.ts
index dbb6bc6fc..d3bdfec44 100755
--- a/.mise/tasks/build/cli2.ts
+++ b/.mise/tasks/build/cli2.ts
@@ -1,6 +1,8 @@
 #!/usr/bin/env bun
 //MISE description="Build CLI2 (TypeScript + Elm in parallel)"
 //MISE depends=["build:cli"]
+//MISE sources=["src/**/*.elm", "cli2/src/**/*.elm", "cli2/elm.json", "cli2/*.ts"]
+//MISE outputs=["cli2/Morphir.Elm.CLI.cjs", "cli2/lib/**/*.js"]
 
 import { elmMake, log, PATHS, join } from "../_lib.ts";
 import { mkdir, rm } from "fs/promises";
diff --git a/.mise/tasks/build/dev-server.ts b/.mise/tasks/build/dev-server.ts
index 9f07fcc41..01a177755 100755
--- a/.mise/tasks/build/dev-server.ts
+++ b/.mise/tasks/build/dev-server.ts
@@ -1,28 +1,27 @@
 #!/usr/bin/env bun
 //MISE description="Build development server Elm components"
 //MISE depends=["build:cli"]
+//MISE sources=["src/**/*.elm", "cli/src/**/*.elm", "cli/elm.json"]
+//MISE outputs=["cli/web/index.js", "cli/web/insight.js", "cli/web/insightapp.js"]
 
 import { elmMake, log, PATHS } from "../_lib.ts";
 
 log("build:dev-server", "Building dev server Elm components...");
 
-// Build all dev server components in parallel
-await Promise.all([
-  // Main dev server app
-  elmMake(["src/Morphir/Web/DevelopApp.elm"], {
-    cwd: PATHS.cli,
-    output: "web/index.js",
-  }),
-  // Insight API
-  elmMake(["src/Morphir/Web/Insight.elm"], {
-    cwd: PATHS.cli,
-    output: "web/insight.js",
-  }),
-  // Dev server API variant
-  elmMake(["src/Morphir/Web/DevelopApp.elm"], {
-    cwd: PATHS.cli,
-    output: "web/insightapp.js",
-  }),
-]);
+// Sequential: concurrent elm make calls against the same elm.json race on
+// cli/elm-stuff and ~/.elm/<package>/artifacts.dat, producing
+// "PROBLEM BUILDING DEPENDENCIES" failures on Windows.
+await elmMake(["src/Morphir/Web/DevelopApp.elm"], {
+  cwd: PATHS.cli,
+  output: "web/index.js",
+});
+await elmMake(["src/Morphir/Web/Insight.elm"], {
+  cwd: PATHS.cli,
+  output: "web/insight.js",
+});
+await elmMake(["src/Morphir/Web/DevelopApp.elm"], {
+  cwd: PATHS.cli,
+  output: "web/insightapp.js",
+});
 
 log("build:dev-server", "Done");
diff --git a/.mise/tasks/build/morphir-ts.ts b/.mise/tasks/build/morphir-ts.ts
index a7380c5be..41413432a 100755
--- a/.mise/tasks/build/morphir-ts.ts
+++ b/.mise/tasks/build/morphir-ts.ts
@@ -1,6 +1,8 @@
 #!/usr/bin/env bun
 //MISE description="Build Morphir TypeScript library"
 //MISE depends=["build:cli", "build:cli2"]
+//MISE sources=["src/**/*.elm", "morphir.json", "morphir-ts/tsconfig.json", "morphir-ts/src/sdk/**/*", "cli/Morphir.Elm.CLI.js", "cli/Morphir.Elm.DevCLI.js", "cli2/Morphir.Elm.CLI.cjs"]
+//MISE outputs=["morphir-ir.json", "morphir-ts/dist/**/*.js", "morphir-ts/src/generated/**/*.ts"]
 
 import { del, morphirMake, morphirGen, exec, log, PATHS, ROOT_DIR, copyGlob, join } from "../_lib.ts";
 
diff --git a/.mise/tasks/build/treeview.ts b/.mise/tasks/build/treeview.ts
index b14070dff..9e8bb53a5 100755
--- a/.mise/tasks/build/treeview.ts
+++ b/.mise/tasks/build/treeview.ts
@@ -1,6 +1,8 @@
 #!/usr/bin/env bun
 //MISE description="Build treeview webpack bundle"
 //MISE depends=["build:check-elm-docs"]
+//MISE sources=["cli/treeview/src/*", "cli/treeview/webpack.config.js", "cli/treeview/tsconfig.json"]
+//MISE outputs=["cli/treeview/dist/bundle.js", "cli/treeview/dist/index.html"]
 
 import { exec, log, PATHS, ROOT_DIR } from "../_lib.ts";
 
diff --git a/.mise/tasks/build/try-morphir.ts b/.mise/tasks/build/try-morphir.ts
index cd873f1c7..7337adaea 100755
--- a/.mise/tasks/build/try-morphir.ts
+++ b/.mise/tasks/build/try-morphir.ts
@@ -1,6 +1,8 @@
 #!/usr/bin/env bun
 //MISE description="Build Try Morphir web app"
 //MISE depends=["build:cli"]
+//MISE sources=["src/**/*.elm", "cli/src/**/*.elm", "cli/elm.json"]
+//MISE outputs=["cli/web/try-morphir.html"]
 
 import { elmMake, log, PATHS } from "../_lib.ts";