unreal-engine
LOW
maintainer alexbelm48
75 votes
scanned 2026-09-17 00:27:14.276658
Why flagged
The package builds Unreal Engine from the official GitHub repository and downloads a toolchain from Epic's CDN; the flagged non-standard host is Epic's own cdn.unrealengine.com, and the privileged install is a standard AUR pattern for setting up group permissions and desktop integration, not malicious activity.
Triggered rules
Low
AI review downgraded a static finding
llm_review
The static rules flagged this MEDIUM, but an AI model (qwen/qwen3-235b-a22b-2507) reviewed the full PKGBUILD and judged it LOW (confidence 95%): The package builds Unreal Engine from the official GitHub repository and downloads a toolchain from Epic's CDN; the flagged non-standard host is Epic's own cdn.unrealengine.com, and the privileged install is a standard AUR pattern for setting up group permissions and desktop integration, not malicious activity.
2 higher static findings superseded - not the current verdict (shown for transparency)
Medium
source=() URL on a non-standard host
source_untrusted_domain
One or more source=() URLs point to a host outside the trusted allowlist (github.com, gitlab.com, codeberg.org, pypi.org, …).
-
PKGBUILD:34
source=("${UE_SDK_VERSION}.tar.gz::https://cdn.unrealengine.com/Toolchain_Linux/${UE_SDK_VERSION}.tar.gz"
Medium
Privileged / out-of-pacman install (sudoers, setuid, or self-update)
privileged_install
The package grants elevated privileges or installs an update path outside pacman: a /etc/sudoers.d rule (often passwordless), a setuid/setgid binary, or a self-update script/service that can fetch and run future code with no checksum verification. The initial install may be verified, but the ongoing privilege + update surface is a real supply-chain / privilege-escalation risk.
-
PKGBUILD:526
find "${pkgdir}/${UE_INSTALL_DIR}" -type d -exec chmod g+s {} +
PKGBUILD
2 offending line(s) highlighted
1
# Old Maintainer: Dylan Ferris <dylan@psilly.com>
2
# Old Maintainer: Michael Lojkovic <mikelojkovic@gmail.com>
3
# Old Maintainer: Shatur95 <genaloner@gmail.com>
4
# Old Maintainer: slx
5
# Old Co-Maintainer: Neko-san <nekoNexus at protonmail dot ch>
6
# Maintainer: Alexis Belmonte <alexbelm48@gmail.com>
7
8
# The source is about 200 MiB, with an extra ~11 GiB of dependencies downloaded in Setup.sh, and may take several hours to compile.
9
# If you want additional options, there are switches below.
10
pkgname=unreal-engine
11
pkgver=5.8.2
12
pkgrel=1
13
## Check unreal-engine/Engine/Config/Linux/Linux_SDK.json (MainVersion value) for what the below should be set to
14
UE_SDK_VERSION="native-linux-v26_clang-20.1.8-rockylinux8"
15
pkgdesc='A 3D game engine by Epic Games which can be used non-commercially for free.'
16
arch=('x86_64' 'x86_64_v2' 'x86_64_v3' 'x86_64_v4' 'aarch64')
17
url=https://www.unrealengine.com/
18
makedepends=('git' 'openssh' 'sed' 'grep' 'glibc' 'wget' 'rsync')
19
depends=('sdl3' 'python' 'dotnet-runtime' 'dotnet-sdk' 'vulkan-icd-loader' 'lld' 'xdg-user-dirs' 'dos2unix' 'openssl' 'steam' 'coreutils' 'findutils')
20
optdepends=('polly: for potentially increased performance'
21
'qt5-base: qmake build system for projects'
22
'cmake: build system for projects'
23
'qtcreator: IDE for projects'
24
'codelite: IDE for projects'
25
'kdevelop: IDE for projects'
26
'clion: IDE for projects'
27
'rider: IDE for projects'
28
'code: IDE for projects'
29
'pacman-contrib: for the paccache cleaning hook'
30
'fake-ms-fonts: Font support for "demo/free/sample/example/tutorial" projects'
31
'ttf-ms-fonts: Font support for "demo/free/sample/example/tutorial" projects')
32
license=('custom:UnrealEngine' 'GPL3')
33
install="${pkgname}.install"
34
source=("${UE_SDK_VERSION}.tar.gz::https://cdn.unrealengine.com/Toolchain_Linux/${UE_SDK_VERSION}.tar.gz"
35
'unreal-engine.sh'
36
'com.unrealengine.UE5Editor.desktop'
37
'0001-override-shared-target-build.patch'
38
'0002-adapt-android-setup-script.patch'
39
'0003-disable-lumen-surface-cache-feedback-on-linux.patch'
40
'unreal-engine-5-pacman-cache.hook'
41
'ue5editor.svg')
42
sha256sums=('6eef42679b744cdcb50276f2d7cff0a51f7ddd632960e06bfbc3f6b9508ef615'
43
'55a8ad79c2e502bc5919249b9d1804ad405795b36630ab2f23aeb99dd218e5f4'
44
'aa09746f9db93713f470ef19390a89b279fd5a335835ad95eab6cdaafa1b9e99'
45
'1cedb43efc103c384705e4e18746fed24c60c52a445e89f1acfd0f2992f5291d'
46
'3da3f449c6b42d49874d8507be476b1178509be099df6f5d58683802d7e05dd2'
47
'db60ce742e6d236a0a9f79b7a8b59496fa2bf003332b244f4a177d81391f83b2'
48
'9386160a91594abeeaf4fe02fea562e7a4ead4c6f9a258c2a37b2e5f10e7deca'
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'b00c398b63f15084c46f3963f62a45284ecd8dae9ba6f38a2c4af370bbfdab8d')
50
# Not sure if compiling Unreal with LTO is legal? Lot's of different proprietary software goes into Unreal
51
options=('!strip' 'staticlibs') # Package is smaller with "strip" but it takes a long time and generates many warnings
52
53
# Default engine installation directory. Can be useful if you do not have a lot of space on the default storage drive
54
# DON'T put a "/" at the start of the path
55
## Set this as an environment variable in /etc/makepkg.conf if you want predefined behavior
56
if [[ "${UE_INSTALL_DIR}" == "" ]]; then
57
export UE_INSTALL_DIR="opt/${pkgname}"
58
fi
59
60
# Change this to true if you have a modern system and don't mind the extra packaging time (and size) to avoid compiling shaders on UE startup later; set to false by default for those with less robust systems
61
## Set this as an environment variable in /etc/makepkg.conf if you want predefined behavior
62
if [[ "${UE_WITH_DDC}" != "true" && "${UE_WITH_DDC}" != "false" ]]; then
63
export UE_WITH_DDC=true
64
fi
65
66
# Enable Win64 toolchain/components in BuildGraph for cross-compilation targets
67
## Set this as an environment variable in /etc/makepkg.conf if you want predefined behavior
68
if [[ "${UE_WITH_WIN64}" != "true" && "${UE_WITH_WIN64}" != "false" ]]; then
69
export UE_WITH_WIN64=true
70
fi
71
72
# Keep full debug info in produced binaries
73
## Set this as an environment variable in /etc/makepkg.conf if you want predefined behavior
74
if [[ "${UE_WITH_FULL_DEBUG_INFO}" != "true" && "${UE_WITH_FULL_DEBUG_INFO}" != "false" ]]; then
75
export UE_WITH_FULL_DEBUG_INFO=false
76
fi
77
78
# BuildGraph platform toggles
79
80
_ue_arch="$(uname -m)"
81
82
## Set these as environment variables in /etc/makepkg.conf if you want predefined behavior
83
if [[ "${UE_WITH_LINUX}" != "true" && "${UE_WITH_LINUX}" != "false" ]]; then
84
if [[ "${_ue_arch}" =~ ^x86_64 ]]; then
85
export UE_WITH_LINUX=true
86
else
87
export UE_WITH_LINUX=false
88
fi
89
fi
90
91
if [[ "${UE_WITH_LINUX_ARM}" != "true" && "${UE_WITH_LINUX_ARM}" != "false" ]]; then
92
if [[ "${_ue_arch}" =~ ^aarch64 ]]; then
93
export UE_WITH_LINUX_ARM=true
94
else
95
export UE_WITH_LINUX_ARM=false
96
fi
97
fi
98
99
if [[ "${UE_WITH_MAC}" != "true" && "${UE_WITH_MAC}" != "false" ]]; then
100
export UE_WITH_MAC=false
101
fi
102
103
if [[ "${UE_WITH_ANDROID}" != "true" && "${UE_WITH_ANDROID}" != "false" ]]; then
104
export UE_WITH_ANDROID=false
105
fi
106
107
if [[ "${UE_WITH_IOS}" != "true" && "${UE_WITH_IOS}" != "false" ]]; then
108
export UE_WITH_IOS=false
109
fi
110
111
if [[ "${UE_WITH_TVOS}" != "true" && "${UE_WITH_TVOS}" != "false" ]]; then
112
export UE_WITH_TVOS=false
113
fi
114
115
# BuildGraph game configurations string (semicolon-separated)
116
## Set this as an environment variable in /etc/makepkg.conf if you want predefined behavior
117
if [[ -z "${UE_GAME_CONFIGURATIONS}" ]]; then
118
export UE_GAME_CONFIGURATIONS="Development;Shipping"
119
fi
120
121
# Change this if you want an alternative non-default logo for UE5's desktop icon; the default logo is enabled by default
122
## Set this as an environment variable in /etc/makepkg.conf if you want predefined behavior
123
if [[ "${UE_USE_DEFAULT_LOGO_AT_INSTALL}" != "1" && "${UE_USE_DEFAULT_LOGO_AT_INSTALL}" != "0" ]]; then
124
export UE_USE_DEFAULT_LOGO_AT_INSTALL=1
125
fi
126
127
128
## This is for detecting your CPU architecture automatically; set to false if you want to enforce your own makepkg.conf file
129
## Disabled by default as a compromise for those bothered by having it force-enabled
130
131
## Note: the resulting package will still be named containing "x86_64" unless the build was done with an "official" Arch distro for that architecture (like Arch ARM - [don't exactly advise using Arch ARM though])
132
## or if you manage to trick your Arch installation to accept other architecture extensions by fiddling with the $CARCH variable and /etc/pacman.conf - this method has flaws, namely due to a bug:
133
## it doesn't work with "makechrootpkg" - though, this PKGBUILD doesn't work in with this method anyway because of Github SSH Agent nonsense -- if this changes in the future, let us know
134
135
# Valid values are false / disabled / default, auto, and native
136
137
# UE_ARCH_AUTO=""
138
139
if [[ -n "$(command -v tr)" ]]; then
140
# shellcheck disable=SC2006
141
UE_ARCH_AUTO="$(echo "${UE_ARCH_AUTO}" | tr '[:upper:]' '[:lower:]')"
142
fi
143
144
case "${UE_ARCH_AUTO}" in
145
"auto"|"true"|"enable"|"enabled"|"1"|"native"|"false"|"disable"|"disabled"|"2")
146
:
147
;;
148
149
*)
150
UE_ARCH_AUTO=false
151
;;
152
esac
153
154
if [[ ${CFLAGS} =~ -O([0-9]+) ]]; then
155
_ue_opt_level="-O${BASH_REMATCH[1]}"
156
else
157
_ue_opt_level="-O3"
158
fi
159
160
_ue_polly_path="$(find /usr/lib /usr/lib64 -name 'LLVMPolly.so' -print -quit 2>/dev/null)"
161
162
if [[ -n "${_ue_polly_path}" ]]; then
163
export CFLAGS="${CFLAGS} -fplugin=LLVMPolly.so -mllvm=-polly -mllvm=-polly-ast-use-context -mllvm=-polly-vectorizer=stripmine -mllvm=-polly-invariant-load-hoisting -mllvm=-polly-run-inliner -mllvm=-polly-run-dce"
164
fi
165
166
_ue_common_cflags="${_ue_opt_level} -pipe -fno-plt -fstack-clash-protection -fstack-protector-strong -fcf-protection -Wl,-z,relro,-z,now -Wformat -Werror=format-security -fPIC -fPIE -Wp,-D_FORTIFY_SOURCE=2"
167
_ue_common_ldflags="-pie -Wl,-O3,--sort-common,--as-needed,-z,relro,-z,now"
168
169
_ue_is_arch_auto_enabled() {
170
case "$1" in
171
auto|true|enable|enabled|1) return 0 ;;
172
*) return 1 ;;
173
esac
174
}
175
176
_ue_set_arch_flags() {
177
local _ue_march="$1"
178
local _ue_tune="$2"
179
180
export CFLAGS="${CFLAGS} -march=${_ue_march} ${_ue_tune} ${_ue_common_cflags}"
181
export CXXFLAGS="${CFLAGS} -Wp,-D_GLIBCXX_ASSERTIONS"
182
export LDFLAGS="${_ue_common_ldflags}"
183
}
184
185
_ue_detect_x86_64_march() {
186
local _ue_ldso="/lib/ld-linux-x86-64.so.2"
187
local _ue_ld_help
188
189
_ue_ld_help="$("${_ue_ldso}" --help 2>/dev/null || true)"
190
191
if grep -qw "x86-64-v4 (supported" <<< "${_ue_ld_help}"; then
192
echo "x86-64-v4"
193
elif grep -qw "x86-64-v3 (supported" <<< "${_ue_ld_help}"; then
194
echo "x86-64-v3"
195
elif grep -qw "x86-64-v2 (supported" <<< "${_ue_ld_help}"; then
196
echo "x86-64-v2"
197
elif grep -Ewq "x86_64.*supported" <<< "${_ue_ld_help}"; then
198
echo "x86-64"
199
else
200
echo ""
201
fi
202
}
203
204
_ue_map_build_arch() {
205
local _ue_source_arch="$1"
206
207
case "${_ue_source_arch}" in
208
x86_64) echo "x64" ;;
209
aarch64) echo "arm64" ;;
210
*) echo "" ;;
211
esac
212
}
213
214
_ue_build_arch="$(_ue_map_build_arch "${_ue_arch}")"
215
216
if _ue_is_arch_auto_enabled "${UE_ARCH_AUTO}"; then
217
if [[ "${_ue_arch}" == "x86_64" ]]; then
218
_ue_detected_march="$(_ue_detect_x86_64_march)"
219
220
if [[ -n "${_ue_detected_march}" ]]; then
221
_ue_set_arch_flags "${_ue_detected_march}" ""
222
else
223
msg "Could not detect a supported x86_64 micro-architecture level. Exiting."
224
return 1
225
fi
226
elif [[ "${_ue_arch}" == "aarch64" ]]; then
227
_ue_set_arch_flags "aarch64" ""
228
else
229
msg "Architecture '${_ue_arch}' is not supported! Exiting."
230
return 1
231
fi
232
elif [[ "${UE_ARCH_AUTO}" == "native" ]]; then
233
_ue_set_arch_flags "native" "-mtune=native"
234
fi
235
236
case "${UE_ARCH_AUTO}" in
237
"auto"|"true"|"enable"|"enabled"|"native"|"1")
238
:
239
;;
240
241
*)
242
if [[ -n "${_ue_polly_path}" ]]; then
243
## Make sure that if polly is installed and the auto-flags above are not used, to add the polly flags to CXXFLAGS for consistency with having them set as CFLAGS
244
CXXFLAGS="${CXXFLAGS} -fplugin=LLVMPolly.so -mllvm=-polly -mllvm=-polly-ast-use-context -mllvm=-polly-vectorizer=stripmine -mllvm=-polly-invariant-load-hoisting -mllvm=-polly-run-inliner -mllvm=-polly-run-dce"
245
fi
246
;;
247
esac
248
249
# Causes a SEGV during derived data cache build if not set
250
export DOTNET_SYSTEM_NET_HTTP_USESOCKETSHTTPHANDLER=0
251
252
# The Roslyn compiler server coordinates its startup through named mutexes, which .NET backs with
253
# lock files under ${TMPDIR}/.dotnet/shm on Linux.
254
#
255
# Concurrent MSBuild nodes racing on those files intermittently make ReleaseMutex throw, surfacing
256
# as
257
#
258
# MSB3883: Unexpected exception: ReleaseMutex failed. WaitOne Id: <n> Release Id: <n>
259
#
260
# on whichever C# projects happened to compile at that moment.
261
#
262
# Compiling in-process sidesteps the server entirely; the engine builds few enough C# assemblies
263
# for the lost process reuse not to matter. MSBuild reads this as a global property, so it also
264
# covers the compilations BuildGraph and UAT spawn.
265
export UseSharedCompilation=false
266
267
# Leftover reuse nodes outlive makepkg and carry stale state into the next build
268
export MSBUILDDISABLENODEREUSE=1
269
270
prepare() {
271
if [[ "${UE_WITH_ANDROID}" == "yes" ]]; then
272
if ! pacman -Q android-studio >/dev/null 2>&1; then
273
error "You need to install Android Studio with its cmdline-tools package first before compiling Unreal Engine with Android export support"
274
elif [[ ! -d "/opt/android-studio/cmdline-tools/latest/bin" ]]; then
275
error "You installed Android Studio, but you haven't installed the cmdline-tools SDK package yet. Please install it first and try again."
276
fi
277
fi
278
279
# Check access to the repository
280
if ! git ls-remote git@github.com:EpicGames/UnrealEngine &>/dev/null; then
281
error 'You must register at unrealengine.com and link your github account to access this private repo. See the wiki for more info: https://wiki.archlinux.org/index.php/Unreal_Engine_4'
282
exit 1
283
fi
284
285
local _ue_install_path="/${UE_INSTALL_DIR#/}"
286
local _ue_arch_detail=""
287
local _ue_use_system_clang="no"
288
local _ue_ddc_text="no"
289
local _ue_debug_text="no"
290
local _ue_default_logo_text="yes"
291
local _ue_target_platforms=()
292
local _ue_platforms_csv="none"
293
294
[[ "${UE_USE_SYSTEM_CLANG}" == "true" ]] && _ue_use_system_clang="yes"
295
[[ "${UE_WITH_DDC}" == "true" ]] && _ue_ddc_text="yes"
296
[[ "${UE_WITH_FULL_DEBUG_INFO}" == "true" ]] && _ue_debug_text="yes"
297
[[ "${UE_USE_DEFAULT_LOGO_AT_INSTALL}" == "0" ]] && _ue_default_logo_text="no"
298
299
[[ "${UE_WITH_WIN64}" == "true" ]] && _ue_target_platforms+=("Windows")
300
[[ "${UE_WITH_LINUX}" == "true" ]] && _ue_target_platforms+=("Linux")
301
[[ "${UE_WITH_LINUX_ARM}" == "true" ]] && _ue_target_platforms+=("Linux (ARM)")
302
[[ "${UE_WITH_MAC}" == "true" ]] && _ue_target_platforms+=("macOS")
303
[[ "${UE_WITH_TVOS}" == "true" ]] && _ue_target_platforms+=("tvOS")
304
[[ "${UE_WITH_ANDROID}" == "true" ]] && _ue_target_platforms+=("Android")
305
[[ "${UE_WITH_IOS}" == "true" ]] && _ue_target_platforms+=("iOS")
306
307
if (( ${#_ue_target_platforms[@]} > 0 )); then
308
local IFS=";"
309
_ue_platforms_csv="${_ue_target_platforms[*]}"
310
fi
311
312
msg ''
313
msg "Unreal Engine ${pkgver} build options summary:"
314
msg ''
315
msg "- End package installation path: ${_ue_install_path}"
316
msg "- Integrate prebuilt shader cache: ${_ue_ddc_text}"
317
msg ''
318
msg "- Target platforms supported for export: ${_ue_platforms_csv}"
319
msg "- Game configurations: ${UE_GAME_CONFIGURATIONS}"
320
msg "- Include full debug info: ${_ue_debug_text}"
321
msg "- Use default logo at install: ${_ue_default_logo_text}"
322
msg ''
323
324
# Download Unreal Engine source or update if the folder exists
325
if [[ ! -d "${pkgname}" ]]
326
then
327
git clone --depth=1 --branch=${pkgver}-release git@github.com:EpicGames/UnrealEngine "${pkgname}"
328
cd "${pkgname}" || return
329
else
330
cd "${pkgname}" || return
331
332
current_cloned_ver="$(git describe --tags --always)"
333
if [[ "${current_cloned_ver}" != "${pkgver}-release" ]]; then
334
cd ..
335
rm -rf "${pkgname}"
336
git clone --depth=1 --branch=${pkgver}-release git@github.com:EpicGames/UnrealEngine "${pkgname}"
337
cd "${pkgname}" || return
338
else
339
rm -f .git/index.lock
340
git fetch --depth=1 origin tag ${pkgver}-release
341
git reset --hard ${pkgver}-release
342
fi
343
fi
344
345
for patch_file in ../*.patch; do
346
msg "Applying ${patch_file}"
347
348
if ! patch -p1 -i "${patch_file}"; then
349
msg "Some or all of the patch at ${patch_file} failed to apply. Will still try to build."
350
fi
351
done
352
353
# Qt Creator source code access
354
if [[ ! -d Engine/Plugins/Developer/QtCreatorSourceCodeAccess ]]
355
then
356
# https://github.com/fire-archive/QtCreatorSourceCodeAccess - See for usage
357
git -C Engine/Plugins/Developer clone --depth=1 https://github.com/fire-archive/QtCreatorSourceCodeAccess
358
fi
359
360
# For some reason, despite this file explicitly asking not to be removed, it was removed from the UE5 source; it has to be re-added or the build will fail
361
if [[ ! -f ${pkgname}/Engine/Source/ThirdParty/Linux/HaveLinuxDependencies ]]
362
then
363
mkdir -p "${srcdir}/${pkgname}/Engine/Source/ThirdParty/Linux/"
364
touch "${srcdir}/${pkgname}/Engine/Source/ThirdParty/Linux/HaveLinuxDependencies"
365
sed -i "1c\This file must have no extension so that GitDeps considers it a binary dependency - it will only be pulled by the Setup script if Linux is enabled. Please do not remove this file." "${srcdir}/${pkgname}/Engine/Source/ThirdParty/Linux/HaveLinuxDependencies"
366
fi
367
368
# Ensure UVS registration is non-interactive during package builds.
369
if [[ -f Setup.sh ]]; then
370
sed -i 's#UnrealVersionSelector-Linux-Shipping -register > /dev/null &#UnrealVersionSelector-Linux-Shipping -register -unattended > /dev/null \&#' Setup.sh
371
fi
372
373
mkdir -p "${srcdir}/git-deps"
374
./Setup.sh --cache="${srcdir}/git-deps"
375
cd "${srcdir}/${pkgname}/Engine/Build/BatchFiles/Linux/" || return
376
377
## This should just be working, but somehow isn't: https://aur.archlinux.org/packages/unreal-engine#comment-986166
378
#./Engine/Build/BatchFiles/Linux/SetupToolchain.sh
379
## So, we're doing this instead:
380
mkdir -p "${srcdir}/${pkgname}/Engine/Extras/ThirdPartyNotUE/SDKs/HostLinux/Linux_x64/"
381
tar -xvf "${srcdir}/${UE_SDK_VERSION}.tar.gz" -C "${srcdir}/${pkgname}/Engine/Extras/ThirdPartyNotUE/SDKs/HostLinux/Linux_x64/"
382
383
"${srcdir}"/"${pkgname}"/Engine/Build/BatchFiles/Linux/BuildThirdParty.sh
384
"${srcdir}"/"${pkgname}"/Engine/Build/BatchFiles/Linux/SetupDotnet.sh
385
"${srcdir}"/"${pkgname}"/Engine/Build/BatchFiles/Linux/FixDependencyFiles.sh
386
387
if [[ "${UE_WITH_ANDROID}" == "yes" ]]; then
388
"${srcdir}"/"${pkgname}"/Engine/Extras/Android/SetupAndroid.sh
389
fi
390
}
391
392
build() {
393
cd "${pkgname}" || return
394
395
# Rebuild UBT from patched source so the pre-built dll is replaced before BuildGraph runs.
396
# RunUBT.sh skips the rebuild when InstalledBuild.txt exists, so we must do it explicitly here.
397
dotnet build "Engine/Source/Programs/UnrealBuildTool/UnrealBuildTool.csproj" \
398
-c Development \
399
-o "Engine/Binaries/DotNET/UnrealBuildTool" \
400
--no-self-contained \
401
-p:GenerateDocumentationFile=false
402
403
if [[ $? -ne 0 ]]; then
404
msg 'Error: Failed to rebuild UnrealBuildTool.'
405
exit $?
406
fi
407
408
"Engine/Build/BatchFiles/RunUAT.sh" BuildGraph \
409
-target="Make Installed Build Linux" \
410
-script=Engine/Build/InstalledEngineBuild.xml \
411
-nosign \
412
-set:WithDDC="${UE_WITH_DDC}" \
413
-set:WithLinux="${UE_WITH_LINUX}" \
414
-set:WithLinuxArm64="${UE_WITH_LINUX_ARM}" \
415
-set:WithWin64="${UE_WITH_WIN64}" \
416
-set:WithMac="${UE_WITH_MAC}" \
417
-set:WithAndroid="${UE_WITH_ANDROID}" \
418
-set:WithIOS="${UE_WITH_IOS}" \
419
-set:WithTVOS="${UE_WITH_TVOS}" \
420
-set:GameConfigurations="${UE_GAME_CONFIGURATIONS}" \
421
-set:WithFullDebugInfo="${UE_WITH_FULL_DEBUG_INFO}"
422
423
if [[ $? -ne 0 ]]; then
424
msg "Error: Build failed; try searching the output for suspicious messages." >&2
425
return;
426
fi
427
}
428
429
package() {
430
# Desktop entry
431
if [[ ! -f com.unrealengine.UE5Editor.desktop && -f com.unrealengine.UE4Editor.desktop ]]; then
432
cp com.unrealengine.UE4Editor.desktop com.unrealengine.UE5Editor.desktop
433
fi
434
435
sed -i "7c\Exec=/usr/bin/unreal-engine %U" com.unrealengine.UE5Editor.desktop
436
sed -i "14c\Path=/usr/bin/" com.unrealengine.UE5Editor.desktop
437
install -Dm644 com.unrealengine.UE5Editor.desktop "${pkgdir}/usr/share/applications/com.unrealengine.UE5Editor.desktop"
438
chmod +x "${pkgdir}/usr/share/applications/com.unrealengine.UE5Editor.desktop"
439
440
## Install a pacman hook to keep old builds from compounding cache by tens of GBs - 2 builds alone can reach at least 30 GBs in pacman's cache; having one only takes up about 15 GBs
441
install -Dm775 unreal-engine-5-pacman-cache.hook "${pkgdir}/etc/pacman.d/hooks/unreal-engine-5-pacman-cache.hook"
442
443
install -dm755 "${pkgdir}/usr/bin"
444
install -dm755 "${pkgdir}/usr/share/pixmaps/"
445
install -dm755 "${pkgdir}/usr/share/applications/"
446
447
# Icon for Desktop entry
448
if [[ "${UE_USE_DEFAULT_LOGO_AT_INSTALL}" == "1" ]]; then
449
install -Dm644 ue5editor.svg "${pkgdir}/usr/share/pixmaps/ue5editor.svg"
450
else
451
mv ue5editor.svg ue5editor.svg.bak
452
wget --output-document "ue5editor.svg" "https://raw.githubusercontent.com/EliverLara/candy-icons/master/apps/scalable/ue4editor.svg"
453
install -Dm644 ue5editor.svg "${pkgdir}/usr/share/pixmaps/ue5editor.svg"
454
wget --output-document "LICENSE" "https://raw.githubusercontent.com/EliverLara/candy-icons/master/LICENSE"
455
mkdir -p "${pkgdir}/usr/share/UnrealEngine/EliverLara-candy-icons/"
456
install -Dm644 LICENSE "${pkgdir}/usr/share/UnrealEngine/EliverLara-candy-icons/"
457
rm ue5editor.svg
458
rm LICENSE
459
mv ue5editor.svg.bak ue5editor.svg
460
fi
461
462
# License
463
install -Dm644 "${srcdir}/${pkgname}/LICENSE.md" "${pkgdir}/usr/share/licenses/UnrealEngine/LICENSE.md"
464
465
# Engine
466
install -dm755 "${pkgdir}/${UE_INSTALL_DIR}/Engine"
467
468
# Copy LocalBuilds to pkg...
469
rsync -a "${srcdir}/${pkgname}/LocalBuilds/Engine/Linux/" "${pkgdir}/${UE_INSTALL_DIR}/"
470
if [[ -f "${srcdir}/${pkgname}/LocalBuilds/Engine/Linux/Engine/Binaries/Linux/UnrealEditor" ]]; then
471
# Can never be too careful with recursive rm...
472
rm -r "${srcdir}/${pkgname}/LocalBuilds"
473
fi
474
475
# BuildGraph's FinalizeInstalledBuild stages this file, carrying the identifier the engine registers
476
# itself under in ~/.config/Epic/UnrealEngine/Install.ini and that the editor stamps into every project
477
# it creates as "EngineAssociation". Its absence makes UBT fall back to a unique build environment and
478
# refuse to build projects against the engine.
479
if [[ ! -f "${pkgdir}/${UE_INSTALL_DIR}/Engine/Build/InstalledBuild.txt" ]]; then
480
error "BuildGraph did not stage Engine/Build/InstalledBuild.txt; the engine would not register as installed."
481
exit 1
482
fi
483
484
# Copy the rest of it to pkg... Should we be overwriting LocalBuilds?
485
rsync -a --exclude='Intermediate/' "${srcdir}/${pkgname}/" "${pkgdir}/${UE_INSTALL_DIR}/"
486
487
# The BuildGraph staging copies the unpatched UBT DLL from CsTools into LocalBuilds,
488
# which then overwrites our patched build. Re-stamp both locations with the patched DLL.
489
local _ubtsrcdir="${srcdir}/${pkgname}/Engine/Source/Programs/UnrealBuildTool"
490
local _ubtpkgdir="${pkgdir}/${pkgname}/${UE_INSTALL_DIR}/Engine/Binaries/DotNET/UnrealBuildTool"
491
492
if [[ -x "$(find "${pkgdir}/${UE_INSTALL_DIR}" -type f -iname 'xbuild')" ]]; then
493
find "${pkgdir}/${UE_INSTALL_DIR}" -type f -iname 'xbuild' -exec chmod +x "{}" \;
494
fi
495
496
if [[ -x "$(find "${pkgdir}/${UE_INSTALL_DIR}" -type f -iname 'mcs')" ]]; then
497
find "${pkgdir}/${UE_INSTALL_DIR}" -type f -iname 'mcs' -exec chmod +x "{}" \;
498
fi
499
500
## Do this, in case the path doesn't exist for some reason
501
mkdir -p "${pkgdir}/${UE_INSTALL_DIR}/Engine/Binaries/Android/"
502
503
# Launch script to initialize missing user folders for Unreal Engine
504
install -Dm755 "${srcdir}/unreal-engine.sh" "${pkgdir}/usr/bin/unreal-engine"
505
chmod +x "${pkgdir}/usr/bin/unreal-engine"
506
ln -s "${pkgdir}/usr/bin/unreal-engine" "${pkgdir}/usr/bin/ue5"
507
ln -s "${pkgdir}/usr/bin/unreal-engine" "${pkgdir}/usr/bin/UE5"
508
ln -s "${pkgdir}/usr/bin/unreal-engine" "${pkgdir}/usr/bin/unreal-engine-5"
509
chmod 755 "${pkgdir}/usr/bin/ue5" "${pkgdir}/usr/bin/UE5" "${pkgdir}/usr/bin/unreal-engine-5"
510
511
# Configuring the launch script to detect when it has been run for the first time
512
# Note: Requires that there isn't already a UE5 desktop entry in "${HOME}/local/share/applications/" - delete yours if you have one there before installing this
513
DesktopFileChecksum=$(sha256sum "${pkgdir}/usr/share/applications/com.unrealengine.UE5Editor.desktop" | cut -f 1 -d ' ')
514
sed -i "s|ChecksumPlaceholder|${DesktopFileChecksum}|" "${pkgdir}/usr/bin/unreal-engine"
515
sed -i "s|InstalledLocationPlaceholder|/${UE_INSTALL_DIR}/Engine/Binaries|" "${pkgdir}/usr/bin/unreal-engine"
516
517
# Ship the resolved install prefix so the .install scriptlet can locate the tree
518
# even when a custom UE_INSTALL_DIR was used at build time.
519
printf '/%s\n' "${UE_INSTALL_DIR#/}" \
520
| install -Dm644 /dev/stdin "${pkgdir}/usr/share/${pkgname}/install-prefix"
521
522
# Bake group-writability into the package so members of the 'unreal' group can
523
# write engine build/runtime artifacts without a manual chown. The group OWNER
524
# is set at install time by the scriptlet, since a -r group's GID is unknown here.
525
chmod -R g+w "${pkgdir}/${UE_INSTALL_DIR}"
526
find "${pkgdir}/${UE_INSTALL_DIR}" -type d -exec chmod g+s {} +
527
}
528
Changes since previous scan
--- PKGBUILD @ 2026-09-12 00:25+++ PKGBUILD @ 2026-09-17 00:27@@ -8,7 +8,7 @@ # The source is about 200 MiB, with an extra ~11 GiB of dependencies downloaded in Setup.sh, and may take several hours to compile. # If you want additional options, there are switches below. pkgname=unreal-engine-pkgver=5.8.0+pkgver=5.8.2 pkgrel=1 ## Check unreal-engine/Engine/Config/Linux/Linux_SDK.json (MainVersion value) for what the below should be set to UE_SDK_VERSION="native-linux-v26_clang-20.1.8-rockylinux8"@@ -249,6 +249,24 @@ # Causes a SEGV during derived data cache build if not set export DOTNET_SYSTEM_NET_HTTP_USESOCKETSHTTPHANDLER=0 +# The Roslyn compiler server coordinates its startup through named mutexes, which .NET backs with+# lock files under ${TMPDIR}/.dotnet/shm on Linux.+#+# Concurrent MSBuild nodes racing on those files intermittently make ReleaseMutex throw, surfacing+# as+# +# MSB3883: Unexpected exception: ReleaseMutex failed. WaitOne Id: <n> Release Id: <n>+#+# on whichever C# projects happened to compile at that moment.+#+# Compiling in-process sidesteps the server entirely; the engine builds few enough C# assemblies+# for the lost process reuse not to matter. MSBuild reads this as a global property, so it also+# covers the compilations BuildGraph and UAT spawn.+export UseSharedCompilation=false++# Leftover reuse nodes outlive makepkg and carry stale state into the next build+export MSBUILDDISABLENODEREUSE=1+ prepare() { if [[ "${UE_WITH_ANDROID}" == "yes" ]]; then if ! pacman -Q android-studio >/dev/null 2>&1; then@@ -454,9 +472,14 @@ rm -r "${srcdir}/${pkgname}/LocalBuilds" fi - # Ensure InstalledBuild.txt is present so UBT treats this as an installed engine,- # preventing the "unique build environment" error when building projects.- printf '%s' "${pkgver}" | install -Dm644 /dev/stdin "${pkgdir}/${UE_INSTALL_DIR}/Engine/Build/InstalledBuild.txt"+ # BuildGraph's FinalizeInstalledBuild stages this file, carrying the identifier the engine registers+ # itself under in ~/.config/Epic/UnrealEngine/Install.ini and that the editor stamps into every project+ # it creates as "EngineAssociation". Its absence makes UBT fall back to a unique build environment and+ # refuse to build projects against the engine.+ if [[ ! -f "${pkgdir}/${UE_INSTALL_DIR}/Engine/Build/InstalledBuild.txt" ]]; then+ error "BuildGraph did not stage Engine/Build/InstalledBuild.txt; the engine would not register as installed."+ exit 1+ fi # Copy the rest of it to pkg... Should we be overwriting LocalBuilds? rsync -a --exclude='Intermediate/' "${srcdir}/${pkgname}/" "${pkgdir}/${UE_INSTALL_DIR}/"@@ -478,7 +501,7 @@ mkdir -p "${pkgdir}/${UE_INSTALL_DIR}/Engine/Binaries/Android/" # Launch script to initialize missing user folders for Unreal Engine- install -Dm755 ../unreal-engine.sh "${pkgdir}/usr/bin/unreal-engine"+ install -Dm755 "${srcdir}/unreal-engine.sh" "${pkgdir}/usr/bin/unreal-engine" chmod +x "${pkgdir}/usr/bin/unreal-engine" ln -s "${pkgdir}/usr/bin/unreal-engine" "${pkgdir}/usr/bin/ue5" ln -s "${pkgdir}/usr/bin/unreal-engine" "${pkgdir}/usr/bin/UE5"Scan history
| Scanned at (UTC) | Severity | Rules |
|---|---|---|
| 2026-09-17 00:27:14 | Low | 3 |
| 2026-09-16 00:03:17 | Low | 3 |
| 2026-09-15 00:25:31 | Low | 3 |
| 2026-09-14 00:27:57 | Low | 3 |
| 2026-09-13 00:19:54 | Low | 3 |
| 2026-09-12 23:12:46 | Medium | 2 |
| 2026-09-12 00:25:17 | Low | 3 |
| 2026-09-11 00:19:22 | Low | 3 |
| 2026-09-10 00:22:44 | Low | 3 |
| 2026-09-09 00:04:09 | Low | 3 |
| 2026-09-08 00:18:08 | Low | 3 |
| 2026-09-07 00:30:15 | Low | 3 |
| 2026-09-06 00:17:06 | Low | 3 |
| 2026-09-05 00:16:27 | Low | 3 |
| 2026-09-04 00:03:13 | Low | 3 |
| 2026-09-03 00:15:47 | Low | 3 |
| 2026-09-02 00:02:31 | Low | 3 |
| 2026-09-01 00:11:19 | Low | 3 |
| 2026-08-31 00:19:57 | Low | 3 |
| 2026-08-30 00:04:14 | Low | 3 |