diff --git a/pkgs/development/python-modules/kaldi-active-grammar/0001-stub.patch b/pkgs/development/python-modules/kaldi-active-grammar/0001-stub.patch
index 4ebe5472b44a..597907c14be6 100644
--- a/pkgs/development/python-modules/kaldi-active-grammar/0001-stub.patch
+++ b/pkgs/development/python-modules/kaldi-active-grammar/0001-stub.patch
@@ -1,8 +1,8 @@
 diff --git a/CMakeLists.txt b/CMakeLists.txt
-index 66e6d49..78f7b42 100644
+index 17c7032..12ed398 100644
 --- a/CMakeLists.txt
 +++ b/CMakeLists.txt
-@@ -1,23 +1,6 @@
+@@ -1,87 +1,12 @@
  cmake_minimum_required(VERSION 3.13.0)
  project(kaldi_binaries)
  
@@ -24,9 +24,8 @@ index 66e6d49..78f7b42 100644
 -endif()
 -
  set(BINARIES
-   tools/openfst/bin/fstarcsort${CMAKE_EXECUTABLE_SUFFIX}
-   tools/openfst/bin/fstcompile${CMAKE_EXECUTABLE_SUFFIX}
-@@ -29,63 +12,6 @@ set(LIBRARIES
+   )
+ set(LIBRARIES
    src/lib/libkaldi-dragonfly${CMAKE_SHARED_LIBRARY_SUFFIX}
    )
  
@@ -87,30 +86,33 @@ index 66e6d49..78f7b42 100644
 -  message(FATAL_ERROR "KALDI_BRANCH not set! Use 'origin/master'?")
 -  # set(KALDI_BRANCH "origin/master")
 -endif()
- 
+-
  message("MAKE_EXE                  = ${MAKE_EXE}")
  message("PYTHON_EXECUTABLE         = ${PYTHON_EXECUTABLE}")
-@@ -99,63 +25,4 @@ message("CMAKE_CURRENT_BINARY_DIR  = ${CMAKE_CURRENT_BINARY_DIR}")
+ message("PYTHON_INCLUDE_DIR        = ${PYTHON_INCLUDE_DIR}")
+@@ -94,65 +19,4 @@ message("CMAKE_CURRENT_BINARY_DIR  = ${CMAKE_CURRENT_BINARY_DIR}")
  
  # CXXFLAGS are set and exported in kaldi-configure-wrapper.sh
  
 -if(NOT "${CMAKE_HOST_SYSTEM_NAME}" STREQUAL "Windows")
 -  set(STRIP_LIBS_COMMAND find src/lib tools/openfst/lib -name *${CMAKE_SHARED_LIBRARY_SUFFIX} | xargs strip)
--  set(STRIP_DST_COMMAND find ${DST} | xargs strip)
+-  # set(STRIP_DST_COMMAND find ${DST} [[[other specifiers]]] | xargs strip)
 -  if("${CMAKE_HOST_SYSTEM_NAME}" STREQUAL "Darwin")
 -    list(APPEND STRIP_LIBS_COMMAND -x)
--    list(APPEND STRIP_DST_COMMAND -x)
+-    # list(APPEND STRIP_DST_COMMAND -x)
 -  endif()
+-  # set(STRIP_LIBS_COMMAND true)
+-  set(STRIP_DST_COMMAND true)
 -  ExternalProject_Add(kaldi
 -    GIT_CONFIG        advice.detachedHead=false
 -    GIT_REPOSITORY    https://github.com/daanzu/kaldi-fork-active-grammar.git
 -    GIT_TAG           ${KALDI_BRANCH}
 -    GIT_SHALLOW       TRUE
--    CONFIGURE_COMMAND sed -i.bak -e "s/status=0/exit 0/g" tools/extras/check_dependencies.sh && cp ${PROJECT_SOURCE_DIR}/building/kaldi-configure-wrapper.sh src/
+-    CONFIGURE_COMMAND sed -i.bak -e "s/status=0/exit 0/g" tools/extras/check_dependencies.sh && sed -i.bak -e "s/openfst_add_CXXFLAGS = -g -O2/openfst_add_CXXFLAGS = -g0 -O3/g" tools/Makefile && cp ${PROJECT_SOURCE_DIR}/building/kaldi-configure-wrapper.sh src/
 -    BUILD_IN_SOURCE   TRUE
--    BUILD_COMMAND     ${MATHLIB_BUILD_COMMAND} && cd tools && ${MAKE_EXE} ${MAKE_FLAGS} && cd openfst && autoreconf && cd ../../src && bash ./kaldi-configure-wrapper.sh ./configure ${KALDI_CONFIG_FLAGS} && ${MAKE_EXE} ${MAKE_FLAGS} depend && ${MAKE_EXE} ${MAKE_FLAGS} dragonfly dragonflybin bin fstbin lmbin
+-    BUILD_COMMAND     ${MATHLIB_BUILD_COMMAND} && cd tools && ${MAKE_EXE} ${MAKE_FLAGS} && cd openfst && autoreconf && cd ../../src && bash ./kaldi-configure-wrapper.sh ./configure ${KALDI_CONFIG_FLAGS} && ${MAKE_EXE} ${MAKE_FLAGS} depend && ${MAKE_EXE} ${MAKE_FLAGS} dragonfly
 -    LIST_SEPARATOR    " "
--    INSTALL_COMMAND   ${STRIP_LIBS_COMMAND} && mkdir -p ${DST} && cp ${BINARIES} ${LIBRARIES} ${DST}
+-    INSTALL_COMMAND   ${STRIP_LIBS_COMMAND} && mkdir -p ${DST} && cp ${BINARIES} ${LIBRARIES} ${DST} && ${STRIP_DST_COMMAND}
 -    )
 -endif()
 -
diff --git a/pkgs/development/python-modules/kaldi-active-grammar/0002-exec-path.patch b/pkgs/development/python-modules/kaldi-active-grammar/0002-exec-path.patch
index 60f50d707db0..3a45ea7e104d 100644
--- a/pkgs/development/python-modules/kaldi-active-grammar/0002-exec-path.patch
+++ b/pkgs/development/python-modules/kaldi-active-grammar/0002-exec-path.patch
@@ -1,5 +1,5 @@
 diff --git a/kaldi_active_grammar/utils.py b/kaldi_active_grammar/utils.py
-index 0b70c7f..21e1d62 100644
+index 823f997..3850336 100644
 --- a/kaldi_active_grammar/utils.py
 +++ b/kaldi_active_grammar/utils.py
 @@ -79,7 +79,7 @@ elif sys.platform.startswith('linux'): platform = 'linux'
@@ -8,10 +8,10 @@ index 0b70c7f..21e1d62 100644
  
 -exec_dir = os.path.join(os.path.dirname(os.path.abspath(__file__)), 'exec', platform)
 +exec_dir = '/'
- library_extension = dict(windows='.dll', linux='.so', macos='.dylib')[platform]
- subprocess_seperator = '^&' if platform == 'windows' else ';'
  
-@@ -89,13 +89,13 @@ class ExternalProcess(object):
+ import ush
+ 
+@@ -87,13 +87,13 @@ class ExternalProcess(object):
  
      shell = ush.Shell(raise_on_error=True)
  
diff --git a/pkgs/development/python-modules/kaldi-active-grammar/default.nix b/pkgs/development/python-modules/kaldi-active-grammar/default.nix
index d5a906dd733b..46fc619b4cb3 100644
--- a/pkgs/development/python-modules/kaldi-active-grammar/default.nix
+++ b/pkgs/development/python-modules/kaldi-active-grammar/default.nix
@@ -50,6 +50,8 @@ buildPythonPackage rec {
   nativeBuildInputs = [ scikit-build cmake ];
   propagatedBuildInputs = [ ush requests numpy cffi ];
 
+  doCheck = false;  # no tests exist
+
   meta = with lib; {
     description = "Python Kaldi speech recognition";
     homepage = "https://github.com/daanzu/kaldi-active-grammar";