diff --git a/lib/default.nix b/lib/default.nix
index 7ac7953..1af41db 100644
--- a/lib/default.nix
+++ b/lib/default.nix
@@ -56,7 +56,7 @@ in
       oizys-zig = pkgs.callPackage ../pkgs/oizys/oizys-zig { inherit zig2nix; };
       oizys-nim = pkgs.callPackage ../pkgs/oizys/oizys-nim { };
       oizys-rs = pkgs.callPackage ../pkgs/oizys/oizys-rs { };
-      oizys-go = pkgs.callPackage ../pkgs/oizys/oizys-go { };
+      oizys-go = pkgs.callPackage ../pkgs/oizys/oizys-go { inherit self;};
       default = oizys-go;
     });
     devShells = forAllSystems (pkgs: {
diff --git a/modules/nix.nix b/modules/nix.nix
index c46fd16..36ccc72 100644
--- a/modules/nix.nix
+++ b/modules/nix.nix
@@ -24,6 +24,9 @@
   environment.systemPackages = [
     pkgs.nixd
     pkgs.nixfmt-rfc-style
+    pkgs.nix-output-monitor
+
+
     self.packages.${pkgs.system}.default
   ];
 
diff --git a/pkgs/oizys/oizys-go/cmd/build.go b/pkgs/oizys/oizys-go/cmd/build.go
index fecfa85..486ca91 100644
--- a/pkgs/oizys/oizys-go/cmd/build.go
+++ b/pkgs/oizys/oizys-go/cmd/build.go
@@ -8,10 +8,11 @@ var buildCmd = &cobra.Command{
 	Use:   "build",
 	Short: "nix build",
 	Run: func(cmd *cobra.Command, args []string) {
-		oizys.NixBuild(args...)
+		oizys.NixBuild(nom, args...)
 	},
 }
 
 func init() {
 	rootCmd.AddCommand(buildCmd)
+	buildCmd.Flags().BoolVar(&nom, "nom", false, "display result with nom")
 }
diff --git a/pkgs/oizys/oizys-go/cmd/checks.go b/pkgs/oizys/oizys-go/cmd/checks.go
new file mode 100644
index 0000000..fb599ca
--- /dev/null
+++ b/pkgs/oizys/oizys-go/cmd/checks.go
@@ -0,0 +1,18 @@
+package cmd
+
+import (
+	"github.com/spf13/cobra"
+)
+
+var checksCmd = &cobra.Command{
+	Use:   "checks",
+	Short: "nix build checks",
+	Run: func(cmd *cobra.Command, args []string) {
+		oizys.Checks(nom, args...)
+	},
+}
+
+func init() {
+	rootCmd.AddCommand(checksCmd)
+	checksCmd.Flags().BoolVar(&nom, "nom", false, "display result with nom")
+}
diff --git a/pkgs/oizys/oizys-go/cmd/root.go b/pkgs/oizys/oizys-go/cmd/root.go
index fef51d9..15ece0b 100644
--- a/pkgs/oizys/oizys-go/cmd/root.go
+++ b/pkgs/oizys/oizys-go/cmd/root.go
@@ -31,6 +31,7 @@ var (
 	host      string
 	cacheName string
 	verbose   bool
+  nom bool
 )
 
 var oizys = o.NewOizys()
diff --git a/pkgs/oizys/oizys-go/default.nix b/pkgs/oizys/oizys-go/default.nix
index 0a47345..f1123c7 100644
--- a/pkgs/oizys/oizys-go/default.nix
+++ b/pkgs/oizys/oizys-go/default.nix
@@ -1,14 +1,25 @@
 {
+  self,
   lib,
   installShellFiles,
   buildGoModule,
   makeWrapper,
   gh,
+  nix-output-monitor,
   ...
 }:
+let 
+mkDate =
+    longDate:
+    (lib.concatStringsSep "-" [
+      (builtins.substring 0 4 longDate)
+      (builtins.substring 4 2 longDate)
+      (builtins.substring 6 2 longDate)
+    ]);
+in
 buildGoModule {
   pname = "oizys";
-  version = "unstable";
+  version = "date=${mkDate self.lastModifiedDate}";
 
   src = lib.cleanSource ./.;
   vendorHash = "sha256-Geqcp0/7I1IF2IfaYyIChz7SOCF+elIEdcz2VsAU0hQ=";
@@ -25,6 +36,6 @@ buildGoModule {
 
   postFixup = ''
     wrapProgram $out/bin/oizys \
-      --prefix PATH ${lib.makeBinPath [ gh ]}
+      --prefix PATH ':' ${lib.makeBinPath [ gh nix-output-monitor ]}
   '';
 }
diff --git a/pkgs/oizys/oizys-go/internal/oizys/main.go b/pkgs/oizys/oizys-go/internal/oizys/main.go
index 8c77511..7d7833e 100644
--- a/pkgs/oizys/oizys-go/internal/oizys/main.go
+++ b/pkgs/oizys/oizys-go/internal/oizys/main.go
@@ -1,6 +1,7 @@
 package oizys
 
 import (
+	"encoding/json"
 	"errors"
 	"fmt"
 	"io/fs"
@@ -24,7 +25,6 @@ type Oizys struct {
 	verbose bool
 }
 
-
 func NewOizys() *Oizys {
 	hostname, err := os.Hostname()
 	if err != nil {
@@ -246,13 +246,59 @@ func runCommand(cmd *exec.Cmd) {
 	}
 }
 
-func (o *Oizys) NixBuild(rest ...string) {
-	args := []string{"build", o.Output()}
-	args = append(args, rest...)
-	cmd := exec.Command("nix", args...)
+// func runBuildWithNom(buildCmd *exec.Cmd) {
+//   log.Println("starting build?")
+// 	nomCmd := exec.Command("nom","--json")
+// 	var err error
+// 	buildCmd.Args = append(buildCmd.Args, "--log-format", "internal-json", "-v")
+// 	nomCmd.Stdin, err = buildCmd.StderrPipe()
+// 	if err != nil {
+// 		log.Fatal(err)
+// 	}
+// 	nomCmd.Stdout = os.Stdout
+// 	nomCmd.Start()
+//   log.Println("starting buildcmd?")
+// 	buildCmd.Run()
+// 	nomCmd.Wait()
+// }
+
+func (o *Oizys) NixBuild(nom bool, rest ...string) {
+	var cmdName string
+	if nom {
+		cmdName = "nom"
+	} else {
+		cmdName = "nix"
+	}
+	cmd := exec.Command(cmdName, "build")
+	cmd.Args = append(cmd.Args, rest...)
 	runCommand(cmd)
 }
 
+func (o *Oizys) getChecks() []string {
+	attrName := fmt.Sprintf("%s#%s", o.flake, "checks.x86_64-linux")
+	cmd := exec.Command("nix", "eval", attrName, "--apply", "builtins.attrNames", "--json")
+	out, err := cmd.Output()
+	if err != nil {
+		log.Fatal(err)
+	}
+	var checks []string
+	if err := json.Unmarshal(out, &checks); err != nil {
+		log.Fatal(err)
+	}
+	return checks
+}
+
+func (o *Oizys) checkPath(name string) string {
+	return fmt.Sprintf("%s#checks.x86_64-linux.%s", o.flake, name)
+}
+
+func (o *Oizys) Checks(nom bool, rest ...string) {
+	checks := o.getChecks()
+	for _, check := range checks {
+		o.NixBuild(nom, o.checkPath(check))
+	}
+}
+
 func (o *Oizys) CacheBuild(rest ...string) {
 	args := []string{
 		"watch-exec", o.cache, "--", "nix",
@@ -289,7 +335,7 @@ func Output(flake string, host string) string {
 
 func nixSpinner(host string) *spinner.Spinner {
 	msg := fmt.Sprintf("%s %s", " evaluating derivation for:",
-    lipgloss.NewStyle().Bold(true).Foreground(lipgloss.Color("6")).Render(host),
+		lipgloss.NewStyle().Bold(true).Foreground(lipgloss.Color("6")).Render(host),
 	)
 	s := spinner.New(
 		spinner.CharSets[14],