Create a new version of paste:

$ yay -S lightspeed-git
:: Checking for conflicts...
:: Checking for inner conflicts...
[Aur:1]  lightspeed-git-r24.e7150f3-1

  1 lightspeed-git                   (Build Files Exist)
==> Packages to cleanBuild?
==> [N]one [A]ll [Ab]ort [I]nstalled [No]tInstalled or (1 2 3, 1-3, ^4)
==> 1
:: Deleting (1/1): /home/photon/.cache/yay/lightspeed-git
:: (1/1) Downloaded PKGBUILD: lightspeed-git
  1 lightspeed-git                   (Build Files Exist)
==> Diffs to show?
==> [N]one [A]ll [Ab]ort [I]nstalled [No]tInstalled or (1 2 3, 1-3, ^4)
==> 
:: (1/1) Parsing SRCINFO: lightspeed-git
==> Making package: lightspeed-git r24.e7150f3-1 (Sa 22 Jan 2022 19:04:20 CET)
==> Retrieving sources...
  -> Cloning lightspeed git repo...
Cloning into bare repository '/home/photon/.cache/yay/lightspeed-git/lightspeed'...
remote: Enumerating objects: 192, done.
remote: Counting objects: 100% (192/192), done.
remote: Compressing objects: 100% (140/140), done.
remote: Total 192 (delta 95), reused 135 (delta 49), pack-reused 0
Receiving objects: 100% (192/192), 1.01 MiB | 5.65 MiB/s, done.
Resolving deltas: 100% (95/95), done.
  -> Found lightspeed.desktop
  -> Found lightspeed.png
==> Validating source files with md5sums...
    lightspeed ... Skipped
    lightspeed.desktop ... Passed
    lightspeed.png ... Passed
==> Making package: lightspeed-git r24.e7150f3-1 (Sa 22 Jan 2022 19:04:22 CET)
==> Checking runtime dependencies...
==> Checking buildtime dependencies...
==> Retrieving sources...
  -> Updating lightspeed git repo...
Fetching origin
  -> Found lightspeed.desktop
  -> Found lightspeed.png
==> Validating source files with md5sums...
    lightspeed ... Skipped
    lightspeed.desktop ... Passed
    lightspeed.png ... Passed
==> Removing existing $srcdir/ directory...
==> Extracting sources...
  -> Creating working copy of lightspeed git repo...
Cloning into 'lightspeed'...
done.
==> Starting pkgver()...
==> Updated version: lightspeed-git r26.11dd711-1
==> Sources are ready.
==> Making package: lightspeed-git r26.11dd711-1 (Sa 22 Jan 2022 19:04:25 CET)
==> Checking runtime dependencies...
==> Checking buildtime dependencies...
==> WARNING: Using existing $srcdir/ tree
==> Starting pkgver()...
==> Starting build()...
configure.ac:42: warning: The macro `AC_TRY_RUN' is obsolete.
configure.ac:42: You should run autoupdate.
./lib/autoconf/general.m4:2997: AC_TRY_RUN is expanded from...
aclocal.m4:34: AM_PATH_GTK_2_0 is expanded from...
configure.ac:42: the top level
configure.ac:42: warning: The macro `AC_TRY_LINK' is obsolete.
configure.ac:42: You should run autoupdate.
./lib/autoconf/general.m4:2920: AC_TRY_LINK is expanded from...
aclocal.m4:34: AM_PATH_GTK_2_0 is expanded from...
configure.ac:42: the top level
configure.ac:24: installing 'config/compile'
src/Makefile.am: installing 'config/depcomp'
checking for a BSD-compatible install... /usr/bin/install -c
checking whether build environment is sane... yes
/home/photon/.cache/yay/lightspeed-git/src/lightspeed/config/missing: Unknown `--is-lightweight' option
Try `/home/photon/.cache/yay/lightspeed-git/src/lightspeed/config/missing --help' for more information
configure: WARNING: 'missing' script is too old or missing
checking for a race-free mkdir -p... /usr/bin/mkdir -p
checking for gawk... gawk
checking whether make sets $(MAKE)... yes
checking whether make supports nested variables... yes
checking whether build environment is sane... yes
checking for gcc... gcc
checking whether the C compiler works... yes
checking for C compiler default output file name... a.out
checking for suffix of executables... 
checking whether we are cross compiling... no
checking for suffix of object files... o
checking whether the compiler supports GNU C... yes
checking whether gcc accepts -g... yes
checking for gcc option to enable C11 features... none needed
checking whether gcc understands -c and -o together... yes
checking whether make supports the include directive... yes (GNU style)
checking dependency style of gcc... gcc3
checking how to run the C preprocessor... gcc -E
checking for stdio.h... yes
checking for stdlib.h... yes
checking for string.h... yes
checking for inttypes.h... yes
checking for stdint.h... yes
checking for strings.h... yes
checking for sys/stat.h... yes
checking for sys/types.h... yes
checking for unistd.h... yes
checking for getopt.h... yes
checking for malloc.h... yes
checking for sys/time.h... yes
checking for an ANSI C-conforming const... yes
checking for size_t... yes
checking for getopt_long... yes
checking for gettimeofday... yes
checking for strcspn... yes
checking for strdup... yes
checking for strtod... yes
checking for pkg-config... /usr/bin/pkg-config
checking pkg-config is at least version 0.9.0... yes
checking for pkg-config... (cached) /usr/bin/pkg-config
checking pkg-config is at least version 0.7... yes
checking for GTK+ - version >= 2.0.1... yes (version 2.24.33)
checking for glBegin in -lGL... yes
checking for gtk_gl_area_new in -lgtkgl-2.0... yes
checking for png_read_info in -lpng... yes
checking for png.h... yes
checking for png_structp in png.h... yes
checking for TIFFReadScanline in -ltiff... yes
checking for tiffio.h... yes
checking that generated files are newer than configure... done
checking that generated files are newer than configure... done
configure: creating ./config.status
config.status: creating Makefile
config.status: creating src/Makefile
config.status: creating config.h
config.status: executing depfiles commands
make  all-recursive
make[1]: Entering directory '/home/photon/.cache/yay/lightspeed-git/src/lightspeed'
Making all in src
make[2]: Entering directory '/home/photon/.cache/yay/lightspeed-git/src/lightspeed/src'
gcc -DHAVE_CONFIG_H -I. -I..     -march=x86-64 -mtune=generic -O2 -pipe -fno-plt -fexceptions         -Wp,-D_FORTIFY_SOURCE=2 -Wformat -Werror=format-security         -fstack-clash-protection -fcf-protection -I/usr/include/gtk-2.0 -I/usr/lib/gtk-2.0/include -I/usr/include/pango-1.0 -I/usr/include/glib-2.0 -I/usr/lib/glib-2.0/include -I/usr/include/harfbuzz -I/usr/include/freetype2 -I/usr/include/libpng16 -I/usr/include/libmount -I/usr/include/blkid -I/usr/include/fribidi -I/usr/include/cairo -I/usr/include/lzo -I/usr/include/pixman-1 -I/usr/include/gdk-pixbuf-2.0 -I/usr/include/atk-1.0 -pthread    -MT animation.o -MD -MP -MF .deps/animation.Tpo -c -o animation.o animation.c
In file included from /usr/include/gtk-2.0/gtk/gtkobject.h:37,
                 from /usr/include/gtk-2.0/gtk/gtkwidget.h:36,
                 from /usr/include/gtk-2.0/gtk/gtkcontainer.h:35,
                 from /usr/include/gtk-2.0/gtk/gtkbin.h:35,
                 from /usr/include/gtk-2.0/gtk/gtkwindow.h:36,
                 from /usr/include/gtk-2.0/gtk/gtkdialog.h:35,
                 from /usr/include/gtk-2.0/gtk/gtkaboutdialog.h:32,
                 from /usr/include/gtk-2.0/gtk/gtk.h:33,
                 from lightspeed.h:46,
                 from animation.c:26:
/usr/include/gtk-2.0/gtk/gtktypeutils.h:236:1: warning: 'GTypeDebugFlags' is deprecated [-Wdeprecated-declarations]
  236 | void            gtk_type_init   (GTypeDebugFlags    debug_flags);
      | ^~~~
In file included from /usr/include/glib-2.0/gobject/gobject.h:24,
                 from /usr/include/glib-2.0/gobject/gbinding.h:29,
                 from /usr/include/glib-2.0/glib-object.h:22,
                 from /usr/include/glib-2.0/gio/gioenums.h:28,
                 from /usr/include/glib-2.0/gio/giotypes.h:28,
                 from /usr/include/glib-2.0/gio/gio.h:26,
                 from /usr/include/gtk-2.0/gdk/gdkapplaunchcontext.h:30,
                 from /usr/include/gtk-2.0/gdk/gdk.h:32,
                 from /usr/include/gtk-2.0/gtk/gtk.h:32,
                 from lightspeed.h:46,
                 from animation.c:26:
/usr/include/glib-2.0/gobject/gtype.h:698:1: note: declared here
  698 | {
      | ^
In file included from /usr/include/gtk-2.0/gtk/gtktoolitem.h:31,
                 from /usr/include/gtk-2.0/gtk/gtktoolbutton.h:30,
                 from /usr/include/gtk-2.0/gtk/gtkmenutoolbutton.h:30,
                 from /usr/include/gtk-2.0/gtk/gtk.h:126,
                 from lightspeed.h:46,
                 from animation.c:26:
/usr/include/gtk-2.0/gtk/gtktooltips.h:73:3: warning: 'GTimeVal' is deprecated: Use 'GDateTime' instead [-Wdeprecated-declarations]
   73 |   GTimeVal last_popdown;
      |   ^~~~~~~~
In file included from /usr/include/glib-2.0/glib/galloca.h:32,
                 from /usr/include/glib-2.0/glib.h:30,
                 from /usr/include/glib-2.0/gobject/gbinding.h:28,
                 from /usr/include/glib-2.0/glib-object.h:22,
                 from /usr/include/glib-2.0/gio/gioenums.h:28,
                 from /usr/include/glib-2.0/gio/giotypes.h:28,
                 from /usr/include/glib-2.0/gio/gio.h:26,
                 from /usr/include/gtk-2.0/gdk/gdkapplaunchcontext.h:30,
                 from /usr/include/gtk-2.0/gdk/gdk.h:32,
                 from /usr/include/gtk-2.0/gtk/gtk.h:32,
                 from lightspeed.h:46,
                 from animation.c:26:
/usr/include/glib-2.0/glib/gtypes.h:547:8: note: declared here
  547 | struct _GTimeVal
      |        ^~~~~~~~~
In file included from lightspeed.h:47,
                 from animation.c:26:
/usr/include/gtkgl-2.0/gtkgl/gtkglarea.h:24:10: fatal error: gtkgl/gdkgl.h: No such file or directory
   24 | #include <gtkgl/gdkgl.h>
      |          ^~~~~~~~~~~~~~~
compilation terminated.
make[2]: *** [Makefile:423: animation.o] Error 1
make[2]: Leaving directory '/home/photon/.cache/yay/lightspeed-git/src/lightspeed/src'
make[1]: *** [Makefile:372: all-recursive] Error 1
make[1]: Leaving directory '/home/photon/.cache/yay/lightspeed-git/src/lightspeed'
make: *** [Makefile:313: all] Error 2
==> ERROR: A failure occurred in build().
    Aborting...
 -> error making: lightspeed-git