diff --git a/fbt b/fbt
index 26f325d455..e6133d07b1 100755
--- a/fbt
+++ b/fbt
@@ -5,7 +5,8 @@
 set -eu;
 
 # private variables
-N_GIT_THREADS="$(getconf _NPROCESSORS_ONLN)";
+N_CORES="$(getconf _NPROCESSORS_ONLN)";
+N_GIT_THREADS="$(($N_CORES * 2))";
 SCRIPT_PATH="$(cd "$(dirname "$0")" && pwd -P)";
 SCONS_DEFAULT_FLAGS="--warn=target-not-built";
 SCONS_EP="python3 -m SCons";
@@ -15,6 +16,7 @@ FBT_NOENV="${FBT_NOENV:-""}";
 FBT_NO_SYNC="${FBT_NO_SYNC:-""}";
 FBT_TOOLCHAIN_PATH="${FBT_TOOLCHAIN_PATH:-$SCRIPT_PATH}";
 FBT_VERBOSE="${FBT_VERBOSE:-""}";
+FBT_GIT_SUBMODULE_SHALLOW="${FBT_GIT_SUBMODULE_SHALLOW:-""}";
 
 if [ -z "$FBT_NOENV" ]; then
     FBT_VERBOSE="$FBT_VERBOSE" . "$SCRIPT_PATH/scripts/toolchain/fbtenv.sh";
@@ -29,7 +31,12 @@ if [ -z "$FBT_NO_SYNC" ]; then
         echo "\".git\" directory not found, please clone repo via \"git clone\"";
         exit 1;
     fi
-    git submodule update --init --jobs "$N_GIT_THREADS";
+    _FBT_CLONE_FLAGS="--jobs $N_GIT_THREADS";
+    if [ ! -z "$FBT_GIT_SUBMODULE_SHALLOW" ]; then
+        _FBT_CLONE_FLAGS="$_FBT_CLONE_FLAGS --depth 1";
+    fi
+
+    git submodule update --init --recursive $_FBT_CLONE_FLAGS;
 fi
 
 $SCONS_EP $SCONS_DEFAULT_FLAGS "$@"
diff --git a/fbt.cmd b/fbt.cmd
index 03e4ec3d09..20432be1c5 100644
--- a/fbt.cmd
+++ b/fbt.cmd
@@ -4,10 +4,18 @@ call "%~dp0scripts\toolchain\fbtenv.cmd" env
 set SCONS_EP=python -m SCons
 
 if [%FBT_NO_SYNC%] == [] (
+    set _FBT_CLONE_FLAGS=--jobs %NUMBER_OF_PROCESSORS%
+    if not [%FBT_GIT_SUBMODULE_SHALLOW%] == [] (
+        set _FBT_CLONE_FLAGS=%_FBT_CLONE_FLAGS% --depth 1
+    )
     if exist ".git" (
-        git submodule update --init --depth 1 --jobs %NUMBER_OF_PROCESSORS%
+        git submodule update --init --recursive %_FBT_CLONE_FLAGS%
+        if %ERRORLEVEL% neq 0 (
+            echo Failed to update submodules, set FBT_NO_SYNC to skip
+            exit /b 1
+        )
     ) else (
-        echo Not in a git repo, please clone with "git clone"
+        echo .git not found, please clone repo with "git clone"
         exit /b 1
     )
 )
diff --git a/lib/flipper_application/elf/elf_file.c b/lib/flipper_application/elf/elf_file.c
index 9b8b4c8f5f..b2c9445ffe 100644
--- a/lib/flipper_application/elf/elf_file.c
+++ b/lib/flipper_application/elf/elf_file.c
@@ -613,10 +613,31 @@ static Elf32_Addr elf_address_of_by_hash(ELFFile* elf, uint32_t hash) {
     return ELF_INVALID_ADDRESS;
 }
 
+static bool elf_file_find_string_by_hash(ELFFile* elf, uint32_t hash, FuriString* out) {
+    bool result = false;
+
+    FuriString* symbol_name = furi_string_alloc();
+    Elf32_Sym sym;
+    for(size_t i = 0; i < elf->symbol_count; i++) {
+        furi_string_reset(symbol_name);
+        if(elf_read_symbol(elf, i, &sym, symbol_name)) {
+            if(elf_symbolname_hash(furi_string_get_cstr(symbol_name)) == hash) {
+                furi_string_set(out, symbol_name);
+                result = true;
+                break;
+            }
+        }
+    }
+    furi_string_free(symbol_name);
+
+    return result;
+}
+
 static bool elf_relocate_fast(ELFFile* elf, ELFSection* s) {
     UNUSED(elf);
     const uint8_t* start = s->fast_rel->data;
     const uint8_t version = *start;
+    bool no_errors = true;
 
     if(version != FAST_RELOCATION_VERSION) {
         FURI_LOG_E(TAG, "Unsupported fast relocation version %d", version);
@@ -664,16 +685,30 @@ static bool elf_relocate_fast(ELFFile* elf, ELFSection* s) {
         }
 
         if(address == ELF_INVALID_ADDRESS) {
-            FURI_LOG_E(TAG, "Failed to resolve address for hash %lX", hash_or_section_index);
-            return false;
-        }
+            FuriString* symbol_name = furi_string_alloc();
+            if(elf_file_find_string_by_hash(elf, hash_or_section_index, symbol_name)) {
+                FURI_LOG_E(
+                    TAG,
+                    "Failed to resolve address for symbol %s (hash %lX)",
+                    furi_string_get_cstr(symbol_name),
+                    hash_or_section_index);
+            } else {
+                FURI_LOG_E(
+                    TAG,
+                    "Failed to resolve address for hash %lX (string not found)",
+                    hash_or_section_index);
+            }
+            furi_string_free(symbol_name);
 
-        for(uint32_t j = 0; j < offsets_count; j++) {
-            uint32_t offset = *((uint32_t*)start) & 0x00FFFFFF;
-            start += 3;
-            // FURI_LOG_I(TAG, "  Fast relocation offset %ld: %ld", j, offset);
-            Elf32_Addr relAddr = ((Elf32_Addr)s->data) + offset;
-            elf_relocate_symbol(elf, relAddr, type, address);
+            no_errors = false;
+            start += 3 * offsets_count;
+        } else {
+            for(uint32_t j = 0; j < offsets_count; j++) {
+                uint32_t offset = *((uint32_t*)start) & 0x00FFFFFF;
+                start += 3;
+                Elf32_Addr relAddr = ((Elf32_Addr)s->data) + offset;
+                elf_relocate_symbol(elf, relAddr, type, address);
+            }
         }
     }
 
@@ -681,7 +716,7 @@ static bool elf_relocate_fast(ELFFile* elf, ELFSection* s) {
     free(s->fast_rel);
     s->fast_rel = NULL;
 
-    return true;
+    return no_errors;
 }
 
 static bool elf_relocate_section(ELFFile* elf, ELFSection* section) {
diff --git a/scripts/fbt/appmanifest.py b/scripts/fbt/appmanifest.py
index ff49707b1d..1a6cae9b17 100644
--- a/scripts/fbt/appmanifest.py
+++ b/scripts/fbt/appmanifest.py
@@ -100,6 +100,10 @@ def supports_hardware_target(self, target: str):
     def is_default_deployable(self):
         return self.apptype != FlipperAppType.DEBUG and self.fap_category != "Examples"
 
+    @property
+    def do_strict_import_checks(self):
+        return self.apptype != FlipperAppType.PLUGIN
+
     def __post_init__(self):
         if self.apptype == FlipperAppType.PLUGIN:
             self.stack_size = 0
diff --git a/scripts/fbt_tools/fbt_extapps.py b/scripts/fbt_tools/fbt_extapps.py
index bc8f9d5df7..963429f245 100644
--- a/scripts/fbt_tools/fbt_extapps.py
+++ b/scripts/fbt_tools/fbt_extapps.py
@@ -42,6 +42,7 @@ def __init__(self, env, app):
         self.ext_apps_work_dir = env["EXT_APPS_WORK_DIR"]
         self.app_work_dir = self.get_app_work_dir(env, app)
         self.app_alias = f"fap_{self.app.appid}"
+        self.icons_src = None
         self.externally_built_files = []
         self.private_libs = []
 
@@ -93,6 +94,7 @@ def _compile_assets(self):
         )
         self.app_env.Alias("_fap_icons", fap_icons)
         self.fw_env.Append(_APP_ICONS=[fap_icons])
+        self.icons_src = next(filter(lambda n: n.path.endswith(".c"), fap_icons))
 
     def _build_private_libs(self):
         for lib_def in self.app.fap_private_libs:
@@ -160,6 +162,10 @@ def _build_app(self):
         if not app_sources:
             raise UserError(f"No source files found for {self.app.appid}")
 
+        # Ensure that icons are included in the build, regardless of user-configured sources
+        if self.icons_src and not self.icons_src in app_sources:
+            app_sources.append(self.icons_src)
+
         ## Uncomment for debug
         # print(f"App sources for {self.app.appid}: {list(f.path for f in app_sources)}")
 
@@ -180,7 +186,9 @@ def _build_app(self):
             self.app._assets_dirs.append(self.app_work_dir.Dir("assets"))
 
         app_artifacts.validator = self.app_env.ValidateAppImports(
-            app_artifacts.compact
+            app_artifacts.compact,
+            _CHECK_APP=self.app.do_strict_import_checks
+            and self.app_env.get("STRICT_FAP_IMPORT_CHECK"),
         )[0]
 
         if self.app.apptype == FlipperAppType.PLUGIN:
@@ -300,7 +308,10 @@ def validate_app_imports(target, source, env):
                 + fg.brightmagenta(f"{disabled_api_syms}")
                 + fg.brightyellow(")")
             )
-        SCons.Warnings.warn(SCons.Warnings.LinkWarning, warning_msg),
+        if env.get("_CHECK_APP"):
+            raise UserError(warning_msg)
+        else:
+            SCons.Warnings.warn(SCons.Warnings.LinkWarning, warning_msg),
 
 
 def GetExtAppByIdOrPath(env, app_dir):
diff --git a/scripts/fbt_tools/sconsrecursiveglob.py b/scripts/fbt_tools/sconsrecursiveglob.py
index 38aa9a839f..e7eb8fb729 100644
--- a/scripts/fbt_tools/sconsrecursiveglob.py
+++ b/scripts/fbt_tools/sconsrecursiveglob.py
@@ -20,10 +20,9 @@ def GlobRecursive(env, pattern, node=".", exclude=[]):
             source=True,
             exclude=exclude,
         )
-    # Otherwise, just check if that's an existing file path
-    # NB: still creates "virtual" nodes as part of existence check
-    elif (file_node := node.File(pattern)).exists() or file_node.rexists():
-        results.append(file_node)
+    # Otherwise, just assume that file at path exists
+    else:
+        results.append(node.File(pattern))
     # print(f"Glob result for {pattern} from {node}: {results}")
     return results
 
diff --git a/scripts/ufbt/commandline.scons b/scripts/ufbt/commandline.scons
index 99c34c35da..a3ba7e08da 100644
--- a/scripts/ufbt/commandline.scons
+++ b/scripts/ufbt/commandline.scons
@@ -88,6 +88,11 @@ vars.AddVariables(
         "CDC Port of Flipper to use, if multiple are connected",
         "auto",
     ),
+    BoolVariable(
+        "STRICT_FAP_IMPORT_CHECK",
+        help="Enable strict import check for .faps",
+        default=True,
+    ),
 )
 
 Return("vars")
diff --git a/site_scons/commandline.scons b/site_scons/commandline.scons
index b8965afe13..6d8810f79f 100644
--- a/site_scons/commandline.scons
+++ b/site_scons/commandline.scons
@@ -274,6 +274,11 @@ vars.AddVariables(
             "clangd",
         ],
     ),
+    BoolVariable(
+        "STRICT_FAP_IMPORT_CHECK",
+        help="Enable strict import check for .faps",
+        default=True,
+    ),
 )
 
 Return("vars")