diff --git a/pkgs/additional/koreader-from-src/default.nix b/pkgs/additional/koreader-from-src/default.nix
index ed09e3e2..1ae3877e 100644
--- a/pkgs/additional/koreader-from-src/default.nix
+++ b/pkgs/additional/koreader-from-src/default.nix
@@ -41,7 +41,11 @@ stdenv.mkDerivation rec {
         inherit name;
         leaveDotGit = true;  # maybe not needed, but we'd need another way to query the rev during build process below
         deepClone = true;  # probably not needed
-      } // src
+      } // src // {
+        # koreader sometimes specifies the rev as `tags/FOO`.
+        # we need to remember that to place the repo where it expects, but we have to strip it here for fetchgit to succeed.
+        rev = lib.removePrefix "tags/" src.rev;
+      }
     ))
     sources.thirdparty
   );
diff --git a/pkgs/additional/koreader-from-src/sources.nix b/pkgs/additional/koreader-from-src/sources.nix
index 3c487901..234a9d81 100644
--- a/pkgs/additional/koreader-from-src/sources.nix
+++ b/pkgs/additional/koreader-from-src/sources.nix
@@ -15,15 +15,20 @@
       rev = "6a1e5ba1c9ef81c205a4b270c3f121a1e106f4fc";
       hash = "sha256-H0HWR+hpAYLGbBdY3BwxgKPUrWhrIsVMnoURdbn8iIE=";
     };
-    # fbink = {  # weird nix/git clone error?
-    #   url = "https://github.com/NiLuJe/FBInk.git";
-    #   rev = "f562bc15a606524694a6d885bed5d83d03c7eb23";
-    # };
-    # freetype2 = {  # weird nix/git clone error?
-    #   url = "https://gitlab.com/koreader/freetype2.git";
-    #   # rev = "VER-2-13-1";
-    #   rev = "e4586d960f339cf75e2e0b34aee30a0ed8353c0d";
-    # };
+    fbink = {
+      url = "https://github.com/NiLuJe/FBInk.git";
+      rev = "f562bc15a606524694a6d885bed5d83d03c7eb23";
+      hash = "sha256-JlanCl4XQBFnrpRIEsowSeUI7wSa9RoQc5h3pkMHXA8=";
+      leaveDotGit = false;
+      deepClone = false;
+    };
+    freetype2 = {
+      url = "https://gitlab.com/koreader/freetype2.git";
+      rev = "VER-2-13-1";
+      hash = "sha256-rQN+hRzrs+KGgp8+n1VJzOOwtKUcRuSE/s/r8/xOUdI=";
+      leaveDotGit = false;
+      deepClone = false;
+    };
     fribidi = {
       url = "https://github.com/fribidi/fribidi.git";
       rev = "tags/v1.0.12";