these 2 derivations will be built:
  /nix/store/sfqld19z9wzxagrs6bnmmkqcc6g52ilz-source.drv
  /nix/store/r6sgjifhd60f2dzjj7d7ax3qpn98py81-gst-plugins-viperfx-unstable-2020-9-20.drv
building '/nix/store/mddhq21hcxvlil6x9x5vkn3awjxs6xna-source.drv'
source> 
source> trying https://github.com/Audio4Linux/gst-plugin-viperfx/archive/a5c1b03dfe1ab0822b717a5f9392e9f1237fdba0.tar.gz
source>   % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
source>                                  Dload  Upload   Total   Spent    Left  Speed
source>   0     0    0     0    0     0      0      0 --:--:-- --:--:-- --:--:--     0
source> 100 24985    0 24985    0     0  41664      0 --:--:-- --:--:-- --:--:-- 95000
source> unpacking source archive /nix/var/nix/builds/nix-2962582-2750242476/a5c1b03dfe1ab0822b717a5f9392e9f1237fdba0.tar.gz
building '/nix/store/r6sgjifhd60f2dzjj7d7ax3qpn98py81-gst-plugins-viperfx-unstable-2020-9-20.drv'
gst-plugins-viperfx-unstable-2020-9-20> unpacking sources
gst-plugins-viperfx-unstable-2020-9-20> unpacking source archive /nix/store/galc1rsw5z4z11632clcdzf73dhigb77-source
gst-plugins-viperfx-unstable-2020-9-20> source root is source
gst-plugins-viperfx-unstable-2020-9-20> patching sources
gst-plugins-viperfx-unstable-2020-9-20> configuring
gst-plugins-viperfx-unstable-2020-9-20> fixing cmake files...
gst-plugins-viperfx-unstable-2020-9-20> cmake flags: -DCMAKE_FIND_USE_SYSTEM_PACKAGE_REGISTRY=OFF -DCMAKE_FIND_USE_PACKAGE_REGISTRY=OFF -DCMAKE_EXPORT_NO_PACKAGE_REGISTRY=ON -DCMAKE_BUILD_TYPE=Release -DBUILD_TESTING=OFF -DCMAKE_INSTALL_LOCALEDIR=/nix/store/kd8aqmzdcw1bj3l6n52axcpqbmlv88fb-gst-plugins-viperfx-unstable-2020-9-20/share/locale -DCMAKE_INSTALL_LIBEXECDIR=/nix/store/kd8aqmzdcw1bj3l6n52axcpqbmlv88fb-gst-plugins-viperfx-unstable-2020-9-20/libexec -DCMAKE_INSTALL_LIBDIR=/nix/store/kd8aqmzdcw1bj3l6n52axcpqbmlv88fb-gst-plugins-viperfx-unstable-2020-9-20/lib -DCMAKE_INSTALL_DOCDIR=/nix/store/kd8aqmzdcw1bj3l6n52axcpqbmlv88fb-gst-plugins-viperfx-unstable-2020-9-20/share/doc/gst-plugin-viperfx -DCMAKE_INSTALL_INFODIR=/nix/store/kd8aqmzdcw1bj3l6n52axcpqbmlv88fb-gst-plugins-viperfx-unstable-2020-9-20/share/info -DCMAKE_INSTALL_MANDIR=/nix/store/kd8aqmzdcw1bj3l6n52axcpqbmlv88fb-gst-plugins-viperfx-unstable-2020-9-20/share/man -DCMAKE_INSTALL_OLDINCLUDEDIR=/nix/store/kd8aqmzdcw1bj3l6n52axcpqbmlv88fb-gst-plugins-viperfx-unstable-2020-9-20/include -DCMAKE_INSTALL_INCLUDEDIR=/nix/store/kd8aqmzdcw1bj3l6n52axcpqbmlv88fb-gst-plugins-viperfx-unstable-2020-9-20/include -DCMAKE_INSTALL_SBINDIR=/nix/store/kd8aqmzdcw1bj3l6n52axcpqbmlv88fb-gst-plugins-viperfx-unstable-2020-9-20/sbin -DCMAKE_INSTALL_BINDIR=/nix/store/kd8aqmzdcw1bj3l6n52axcpqbmlv88fb-gst-plugins-viperfx-unstable-2020-9-20/bin -DCMAKE_INSTALL_NAME_DIR=/nix/store/kd8aqmzdcw1bj3l6n52axcpqbmlv88fb-gst-plugins-viperfx-unstable-2020-9-20/lib -DCMAKE_POLICY_DEFAULT_CMP0025=NEW -DCMAKE_OSX_SYSROOT= -DCMAKE_FIND_FRAMEWORK=LAST -DCMAKE_STRIP=/nix/store/wn31i3dzwahz6ccws8bs1nwyqrpgsvj7-gcc-wrapper-11.3.0/bin/strip -DCMAKE_RANLIB=/nix/store/wn31i3dzwahz6ccws8bs1nwyqrpgsvj7-gcc-wrapper-11.3.0/bin/ranlib -DCMAKE_AR=/nix/store/wn31i3dzwahz6ccws8bs1nwyqrpgsvj7-gcc-wrapper-11.3.0/bin/ar -DCMAKE_C_COMPILER=gcc -DCMAKE_CXX_COMPILER=g++ -DCMAKE_INSTALL_PREFIX=/nix/store/kd8aqmzdcw1bj3l6n52axcpqbmlv88fb-gst-plugins-viperfx-unstable-2020-9-20  
gst-plugins-viperfx-unstable-2020-9-20> -- The C compiler identification is GNU 11.3.0
gst-plugins-viperfx-unstable-2020-9-20> -- The CXX compiler identification is GNU 11.3.0
gst-plugins-viperfx-unstable-2020-9-20> -- Detecting C compiler ABI info
gst-plugins-viperfx-unstable-2020-9-20> -- Detecting C compiler ABI info - done
gst-plugins-viperfx-unstable-2020-9-20> -- Check for working C compiler: /nix/store/wn31i3dzwahz6ccws8bs1nwyqrpgsvj7-gcc-wrapper-11.3.0/bin/gcc - skipped
gst-plugins-viperfx-unstable-2020-9-20> -- Detecting C compile features
gst-plugins-viperfx-unstable-2020-9-20> -- Detecting C compile features - done
gst-plugins-viperfx-unstable-2020-9-20> -- Detecting CXX compiler ABI info
gst-plugins-viperfx-unstable-2020-9-20> -- Detecting CXX compiler ABI info - done
gst-plugins-viperfx-unstable-2020-9-20> -- Check for working CXX compiler: /nix/store/wn31i3dzwahz6ccws8bs1nwyqrpgsvj7-gcc-wrapper-11.3.0/bin/g++ - skipped
gst-plugins-viperfx-unstable-2020-9-20> -- Detecting CXX compile features
gst-plugins-viperfx-unstable-2020-9-20> -- Detecting CXX compile features - done
gst-plugins-viperfx-unstable-2020-9-20> -- Found PkgConfig: /nix/store/k2vd7w2ixbqbgd9v88am8780111bng7j-pkg-config-wrapper-0.29.2/bin/pkg-config (found version "0.29.2") 
gst-plugins-viperfx-unstable-2020-9-20> -- Checking for modules 'gstreamer-1.0>=1.0;gstreamer-base-1.0>=1.0;gstreamer-controller-1.0>=1.0;gstreamer-audio-1.0>=1.0'
gst-plugins-viperfx-unstable-2020-9-20> --   Found gstreamer-1.0, version 1.20.3
gst-plugins-viperfx-unstable-2020-9-20> --   Found gstreamer-base-1.0, version 1.20.3
gst-plugins-viperfx-unstable-2020-9-20> --   Found gstreamer-controller-1.0, version 1.20.3
gst-plugins-viperfx-unstable-2020-9-20> --   Found gstreamer-audio-1.0, version 1.20.3
gst-plugins-viperfx-unstable-2020-9-20> Package libpcre2-8 was not found in the pkg-config search path.
gst-plugins-viperfx-unstable-2020-9-20> Perhaps you should add the directory containing `libpcre2-8.pc'
gst-plugins-viperfx-unstable-2020-9-20> to the PKG_CONFIG_PATH environment variable
gst-plugins-viperfx-unstable-2020-9-20> Package 'libpcre2-8', required by 'glib-2.0', not found
gst-plugins-viperfx-unstable-2020-9-20> Package libpcre2-8 was not found in the pkg-config search path.
gst-plugins-viperfx-unstable-2020-9-20> Perhaps you should add the directory containing `libpcre2-8.pc'
gst-plugins-viperfx-unstable-2020-9-20> to the PKG_CONFIG_PATH environment variable
gst-plugins-viperfx-unstable-2020-9-20> Package 'libpcre2-8', required by 'glib-2.0', not found
gst-plugins-viperfx-unstable-2020-9-20> Package libpcre2-8 was not found in the pkg-config search path.
gst-plugins-viperfx-unstable-2020-9-20> Perhaps you should add the directory containing `libpcre2-8.pc'
gst-plugins-viperfx-unstable-2020-9-20> to the PKG_CONFIG_PATH environment variable
gst-plugins-viperfx-unstable-2020-9-20> Package 'libpcre2-8', required by 'glib-2.0', not found
gst-plugins-viperfx-unstable-2020-9-20> Package libpcre2-8 was not found in the pkg-config search path.
gst-plugins-viperfx-unstable-2020-9-20> Perhaps you should add the directory containing `libpcre2-8.pc'
gst-plugins-viperfx-unstable-2020-9-20> to the PKG_CONFIG_PATH environment variable
gst-plugins-viperfx-unstable-2020-9-20> Package 'libpcre2-8', required by 'glib-2.0', not found
gst-plugins-viperfx-unstable-2020-9-20> -- Checking for modules 'glib-2.0;gio-unix-2.0'
gst-plugins-viperfx-unstable-2020-9-20> --   Found glib-2.0, version 2.74.3
gst-plugins-viperfx-unstable-2020-9-20> --   Found gio-unix-2.0, version 2.74.3
gst-plugins-viperfx-unstable-2020-9-20> Package libpcre2-8 was not found in the pkg-config search path.
gst-plugins-viperfx-unstable-2020-9-20> Perhaps you should add the directory containing `libpcre2-8.pc'
gst-plugins-viperfx-unstable-2020-9-20> to the PKG_CONFIG_PATH environment variable
gst-plugins-viperfx-unstable-2020-9-20> Package 'libpcre2-8', required by 'glib-2.0', not found
gst-plugins-viperfx-unstable-2020-9-20> Package libpcre2-8 was not found in the pkg-config search path.
gst-plugins-viperfx-unstable-2020-9-20> Perhaps you should add the directory containing `libpcre2-8.pc'
gst-plugins-viperfx-unstable-2020-9-20> to the PKG_CONFIG_PATH environment variable
gst-plugins-viperfx-unstable-2020-9-20> Package 'libpcre2-8', required by 'glib-2.0', not found
gst-plugins-viperfx-unstable-2020-9-20> Package libpcre2-8 was not found in the pkg-config search path.
gst-plugins-viperfx-unstable-2020-9-20> Perhaps you should add the directory containing `libpcre2-8.pc'
gst-plugins-viperfx-unstable-2020-9-20> to the PKG_CONFIG_PATH environment variable
gst-plugins-viperfx-unstable-2020-9-20> Package 'libpcre2-8', required by 'glib-2.0', not found
gst-plugins-viperfx-unstable-2020-9-20> Package libpcre2-8 was not found in the pkg-config search path.
gst-plugins-viperfx-unstable-2020-9-20> Perhaps you should add the directory containing `libpcre2-8.pc'
gst-plugins-viperfx-unstable-2020-9-20> to the PKG_CONFIG_PATH environment variable
gst-plugins-viperfx-unstable-2020-9-20> Package 'libpcre2-8', required by 'glib-2.0', not found
gst-plugins-viperfx-unstable-2020-9-20> -- Configuring done
gst-plugins-viperfx-unstable-2020-9-20> -- Generating done
gst-plugins-viperfx-unstable-2020-9-20> CMake Warning:
gst-plugins-viperfx-unstable-2020-9-20>   Manually-specified variables were not used by the project:
gst-plugins-viperfx-unstable-2020-9-20> 
gst-plugins-viperfx-unstable-2020-9-20>     BUILD_TESTING
gst-plugins-viperfx-unstable-2020-9-20>     CMAKE_EXPORT_NO_PACKAGE_REGISTRY
gst-plugins-viperfx-unstable-2020-9-20>     CMAKE_INSTALL_BINDIR
gst-plugins-viperfx-unstable-2020-9-20>     CMAKE_INSTALL_DOCDIR
gst-plugins-viperfx-unstable-2020-9-20>     CMAKE_INSTALL_INCLUDEDIR
gst-plugins-viperfx-unstable-2020-9-20>     CMAKE_INSTALL_INFODIR
gst-plugins-viperfx-unstable-2020-9-20>     CMAKE_INSTALL_LIBDIR
gst-plugins-viperfx-unstable-2020-9-20>     CMAKE_INSTALL_LIBEXECDIR
gst-plugins-viperfx-unstable-2020-9-20>     CMAKE_INSTALL_LOCALEDIR
gst-plugins-viperfx-unstable-2020-9-20>     CMAKE_INSTALL_MANDIR
gst-plugins-viperfx-unstable-2020-9-20>     CMAKE_INSTALL_OLDINCLUDEDIR
gst-plugins-viperfx-unstable-2020-9-20>     CMAKE_INSTALL_SBINDIR
gst-plugins-viperfx-unstable-2020-9-20>     CMAKE_POLICY_DEFAULT_CMP0025
gst-plugins-viperfx-unstable-2020-9-20> 
gst-plugins-viperfx-unstable-2020-9-20> 
gst-plugins-viperfx-unstable-2020-9-20> -- Build files have been written to: /build/source/build
gst-plugins-viperfx-unstable-2020-9-20> cmake: enabled parallel building
gst-plugins-viperfx-unstable-2020-9-20> building
gst-plugins-viperfx-unstable-2020-9-20> build flags: -j48 SHELL=/nix/store/4xw8n979xpivdc46a9ndcvyhwgif00hz-bash-5.1-p16/bin/bash
gst-plugins-viperfx-unstable-2020-9-20> [ 25%] Building C object CMakeFiles/gst-plugin-viperfx.dir/src/gstviperfx.c.o
gst-plugins-viperfx-unstable-2020-9-20> [ 50%] Building C object CMakeFiles/gst-plugin-viperfx.dir/src/dbus-interface.c.o
gst-plugins-viperfx-unstable-2020-9-20> [ 75%] Building C object CMakeFiles/gst-plugin-viperfx.dir/src/viperfx_so.c.o
gst-plugins-viperfx-unstable-2020-9-20> In file included from /nix/store/02ggkplpkvdjkr20bylnidhn7cyh66m4-glib-2.74.3-dev/include/glib-2.0/gobject/gobject.h:26,
gst-plugins-viperfx-unstable-2020-9-20>                  from /nix/store/02ggkplpkvdjkr20bylnidhn7cyh66m4-glib-2.74.3-dev/include/glib-2.0/gobject/gbinding.h:31,
gst-plugins-viperfx-unstable-2020-9-20>                  from /nix/store/02ggkplpkvdjkr20bylnidhn7cyh66m4-glib-2.74.3-dev/include/glib-2.0/glib-object.h:24,
gst-plugins-viperfx-unstable-2020-9-20>                  from /nix/store/d107dwvn292w0c299qvhlkdh98p3mmzm-gstreamer-1.20.3-dev/include/gstreamer-1.0/gst/gstenumtypes.h:6,
gst-plugins-viperfx-unstable-2020-9-20>                  from /nix/store/d107dwvn292w0c299qvhlkdh98p3mmzm-gstreamer-1.20.3-dev/include/gstreamer-1.0/gst/gst.h:31,
gst-plugins-viperfx-unstable-2020-9-20>                  from /build/source/src/gstviperfx.c:14:
gst-plugins-viperfx-unstable-2020-9-20> /build/source/src/gstviperfx.c: In function 'gst_viperfx_class_init':
gst-plugins-viperfx-unstable-2020-9-20> /nix/store/02ggkplpkvdjkr20bylnidhn7cyh66m4-glib-2.74.3-dev/include/glib-2.0/gobject/gtype.h:2507:6: warning: passing argument 1 of 'gst_audio_filter_class_add_pad_templates' from incompatible pointer type [-Wincompatible-pointer-types]
gst-plugins-viperfx-unstable-2020-9-20>  2507 |     ((ct*) (void *) g_type_check_class_cast ((GTypeClass*) cp, gt))
gst-plugins-viperfx-unstable-2020-9-20> /nix/store/02ggkplpkvdjkr20bylnidhn7cyh66m4-glib-2.74.3-dev/include/glib-2.0/gobject/gtype.h:572:66: note: in expansion of macro '_G_TYPE_CCC'
gst-plugins-viperfx-unstable-2020-9-20>   572 | #define G_TYPE_CHECK_CLASS_CAST(g_class, g_type, c_type)        (_G_TYPE_CCC ((g_class), (g_type), c_type))
gst-plugins-viperfx-unstable-2020-9-20>       |                                                                  ^~~~~~~~~~~
gst-plugins-viperfx-unstable-2020-9-20> /build/source/src/gstviperfx.h:17:38: note: in expansion of macro 'G_TYPE_CHECK_CLASS_CAST'
gst-plugins-viperfx-unstable-2020-9-20>    17 | #define GST_VIPERFX_CLASS(klass)    (G_TYPE_CHECK_CLASS_CAST((klass) ,GST_TYPE_VIPERFX,GstviperfxClass))
gst-plugins-viperfx-unstable-2020-9-20>       |                                      ^~~~~~~~~~~~~~~~~~~~~~~
gst-plugins-viperfx-unstable-2020-9-20> /build/source/src/gstviperfx.c:459:46: note: in expansion of macro 'GST_VIPERFX_CLASS'
gst-plugins-viperfx-unstable-2020-9-20>   459 |     gst_audio_filter_class_add_pad_templates(GST_VIPERFX_CLASS (klass), caps);
gst-plugins-viperfx-unstable-2020-9-20>       |                                              ^~~~~~~~~~~~~~~~~
gst-plugins-viperfx-unstable-2020-9-20> In file included from /nix/store/si3rf2piakx47irhpsrnnyd78d1c1ls2-gst-plugins-base-1.20.3-dev/include/gstreamer-1.0/gst/audio/audio.h:108,
gst-plugins-viperfx-unstable-2020-9-20>                  from /build/source/src/gstviperfx.c:17:
gst-plugins-viperfx-unstable-2020-9-20> /nix/store/si3rf2piakx47irhpsrnnyd78d1c1ls2-gst-plugins-base-1.20.3-dev/include/gstreamer-1.0/gst/audio/gstaudiofilter.h:99:73: note: expected 'GstAudioFilterClass *' {aka 'struct _GstAudioFilterClass *'} but argument is of type 'GstviperfxClass *' {aka 'struct _GstviperfxClass *'}
gst-plugins-viperfx-unstable-2020-9-20>    99 | void    gst_audio_filter_class_add_pad_templates (GstAudioFilterClass * klass,
gst-plugins-viperfx-unstable-2020-9-20>       |                                                   ~~~~~~~~~~~~~~~~~~~~~~^~~~~
gst-plugins-viperfx-unstable-2020-9-20> [100%] Linking C shared library libgstviperfx.so
gst-plugins-viperfx-unstable-2020-9-20> [100%] Built target gst-plugin-viperfx
gst-plugins-viperfx-unstable-2020-9-20> glibPreInstallPhase
gst-plugins-viperfx-unstable-2020-9-20> installing
gst-plugins-viperfx-unstable-2020-9-20> glibPreFixupPhase
gst-plugins-viperfx-unstable-2020-9-20> gappsWrapperArgsHook
gst-plugins-viperfx-unstable-2020-9-20> post-installation fixup
gst-plugins-viperfx-unstable-2020-9-20> shrinking RPATHs of ELF executables and libraries in /nix/store/kd8aqmzdcw1bj3l6n52axcpqbmlv88fb-gst-plugins-viperfx-unstable-2020-9-20
gst-plugins-viperfx-unstable-2020-9-20> shrinking /nix/store/kd8aqmzdcw1bj3l6n52axcpqbmlv88fb-gst-plugins-viperfx-unstable-2020-9-20/lib/gstreamer-1.0/libgstviperfx.so
gst-plugins-viperfx-unstable-2020-9-20> strip is /nix/store/wn31i3dzwahz6ccws8bs1nwyqrpgsvj7-gcc-wrapper-11.3.0/bin/strip
gst-plugins-viperfx-unstable-2020-9-20> stripping (with command strip and flags -S) in  /nix/store/kd8aqmzdcw1bj3l6n52axcpqbmlv88fb-gst-plugins-viperfx-unstable-2020-9-20/lib
gst-plugins-viperfx-unstable-2020-9-20> patching script interpreter paths in /nix/store/kd8aqmzdcw1bj3l6n52axcpqbmlv88fb-gst-plugins-viperfx-unstable-2020-9-20
gst-plugins-viperfx-unstable-2020-9-20> checking for references to /build/ in /nix/store/kd8aqmzdcw1bj3l6n52axcpqbmlv88fb-gst-plugins-viperfx-unstable-2020-9-20...

upload niks3: ok