diff --git a/.github/workflows/check-flake-files.yml b/.github/workflows/check-flake-files.yml
index c01eda8..08803b1 100644
--- a/.github/workflows/check-flake-files.yml
+++ b/.github/workflows/check-flake-files.yml
@@ -37,7 +37,7 @@ jobs:
         do
           echo "::group::Group \"$(basename $flake_group .toml)\""
 
-         nix run --accept-flake-config .#flake-info -- group "$flake_group" "$(basename "$flake_group" .toml)" --report
+         nix run --accept-flake-config .#flake-info -- --json group "$flake_group" "$(basename "$flake_group" .toml)" --report
 
           if [[ -f "./report.txt" ]]
           then
diff --git a/flake-info/README.md b/flake-info/README.md
index 47de527..3e63cea 100644
--- a/flake-info/README.md
+++ b/flake-info/README.md
@@ -127,7 +127,7 @@ An example `targets.json` file can look like the following
 ```
 
 ```
-$ flake-info group ./targets.json small-group
+$ flake-info --json group ./targets.json small-group
 ```
 
 ### Elasticsearch
diff --git a/flakes/manual.toml b/flakes/manual.toml
index dec0738..a15d6a4 100644
--- a/flakes/manual.toml
+++ b/flakes/manual.toml
@@ -43,16 +43,6 @@ type = "gitlab"
 owner = "pi-lar"
 repo = "neuropil"
 
-[[sources]]
-type = "github"
-owner = "tweag"
-repo = "nickel"
-
-[[sources]]
-type = "github"
-owner = "pinpox"
-repo = "nixos"
-
 [[sources]]
 type = "github"
 owner = "Mic92"
@@ -78,11 +68,6 @@ type = "github"
 owner = "yusdacra"
 repo = "rust-nix-templater"
 
-[[sources]]
-type = "github"
-owner = "srid"
-repo = "emanote"
-
 [[sources]]
 type = "git"
 url = "git+https://git.sr.ht/~kerstin/sway-timetracker?ref=main"
@@ -92,15 +77,6 @@ type = "github"
 owner = "PrismLauncher"
 repo = "PrismLauncher"
 
-[[sources]]
-type = "gitlab"
-owner = "simple-nixos-mailserver"
-repo = "nixos-mailserver"
-
-[[sources]]
-type = "git"
-url = "git+https://codeberg.org/wolfangaukang/stream-alert-bot?ref=main"
-
 [[sources]]
 type = "git"
 url = "git+https://codeberg.org/wolfangaukang/python-trovo?ref=main"
@@ -114,11 +90,6 @@ type = "github"
 owner = "juliosueiras-nix"
 repo = "nix-security"
 
-[[sources]]
-type = "github"
-owner = "astro"
-repo = "microvm.nix"
-
 [[sources]]
 type = "github"
 owner = "lnbits"